Winner of the Hugo Award • The future of Earth will rely upon one man’s sense of right and wrong. . . .

Father Ruiz-Sanchez is a dedicated man—a priest who is also a scientist, and a scientist who is also a human being. He has found no insoluble conflicts in his beliefs or his ethics . . . until he is sent to Lithia. There he comes upon a race of aliens who are admirable in every way except for their total reliance on cold reason; they are incapable of faith or belief.

Confronted with a profound scientific riddle and ethical quandary, Father Ruiz-Sanchez soon finds himself torn between the teachings of his faith, the teachings of his science, and the inner promptings of his humanity. There is only one solution: He must accept an ancient and unforgivable heresy—and risk the futures of both worlds . . .

Amazon.com Review

The citizens of the planet Lithia are some of the most ethical sentient beings Father Ramon Ruiz-Sanchez has ever encountered. True, they have no literature, no fine arts, and don't understand the concept of recreation, but neither do they understand the concepts of greed, envy, lust, or any of the sins and vices that plague humankind. Their world seems darned near perfect. And that is just what disturbs the good Father.

First published in 1959, James Blish's Hugo Award-winning A Case of Conscience is science fiction at its very best: a fast-paced, intelligent story that offers plenty of action while at the same time explores complex questions of values and ethics. In this case, Blish has taken on the age-old battle of good vs. evil. Lithia poses a theological question that lies at the heart of this book: is God necessary for a moral society? The Lithians are nothing if not moral. Not only do they lack the seven deadly sins, they also lack original sin. And without any sort of religious framework, they have created the Christian ideal world, one that humans would be eager to study and emulate. But is it too perfect? Is it in fact, as Father Ruiz-Sanchez suspects, the work of The Adversary? And what role does Egtverchi, the young Lithian raised on Earth, play? Is he an innocent victim of circumstance, or will he bring about the Dies Irae, the day of the wrath of God, upon the earth? The fate of two worlds hinges on the answers to these questions, and will lead to an ancient earth heresy that shakes the Jesuit priest's beliefs to their very core.

A Case of Conscience is a brilliant piece of storytelling, and it packs a lot into a scant 242 pages. Most readers will probably finish the book in one sitting, unable to stop until the spectacular denouement. But the questions posed by this little-known gem will stay with you for days afterward. --P.M. Atterberry

From the Inside Flap

Father Ruiz-Sanchez is a dedicated man--a priest who is also a scientist, and a scientist who is also a human being. He has found no insoluble conflicts in his beliefs or his ethics . . . until he is sent to Lithia. There he comes upon a race of aliens who are admirable in every way except for their total reliance on cold reason; they are incapable of faith or belief.

Confronted with a profound scientific riddle and ethical quandary, Father Ruiz-Sanchez soon finds himself torn between the teachings of his faith, the teachings of his science, and the inner promptings of his humanity. There is only one solution: He must accept an ancient and unforgivable heresy--and risk the futures of both worlds . . .

From the Back Cover

Father Ruiz-Sanchez is a dedicated man--a priest who is also a scientist, and a scientist who is also a human being. He has found no insoluble conflicts in his beliefs or his ethics . . . until he is sent to Lithia. There he comes upon a race of aliens who are admirable in every way except for their total reliance on cold reason; they are incapable of faith or belief.
Confronted with a profound scientific riddle and ethical quandary, Father Ruiz-Sanchez soon finds himself torn between the teachings of his faith, the teachings of his science, and the inner promptings of his humanity. There is only one solution: He must accept an ancient and unforgivable heresy--and risk the futures of both worlds . . .

About the Author

James Blish served in World War II as a medical technician, joined the Futurians--a group of science fiction writers, fans, editors, and publishers-- wrote more than twenty books, and won the Hugo Award for A Case of Conscience in 1959. He moved to England in 1968 and continued to write until his death in 1975. In later years, James Blish contributed original stories and screenplays to the Star Trek saga.

Excerpt. © Reprinted by permission. All rights reserved.

The stone door slammed. It was Cleaver's trade-mark: there had never been
a door too heavy, complex, or cleverly tracked to prevent him from closing
it with a sound like a clap of doom. And no planet in the universe could
possess an air sufficiently thick and curtained with damp to muffle that
sound--not even Lithia.

Father Ramon Ruiz-Sanchez, late of Peru, and always Clerk Regular of the
Society of Jesus, professed father of the four vows, continued to read. It
would take Paul Cleaver's impatient fingers quite a while to free him from
his jungle suit, and in the meantime the problem remained. It was a
century-old problem, first propounded in 1939, but the Church had never
cracked it. And it was diabolically complex (that adverb was official,
precisely chosen, and intended to be taken literally.) Even the novel
which had proposed the case was on the Index Expurgatorius, and Father
Ruiz-Sanchez had spiritual access to it only by virtue of his Order.

He turned the page, scarcely hearing the stamping and muttering in the
hall. On and on the text ran, becoming more tangled, more evil, more
insoluble with every word:

. . . Magravius threatens to have Anita molested by Sulla, an orthodox
savage (and leader of a band of twelve mercenaries, the Sullivani,) who
desires to procure Felicia for Gregorius, Leo Vitellius and Macdugalius,
four excavators, if she will not yield to him and also deceive Honuphrius
by rendering conjugal duty when demanded. Anita who claims to have
discovered incestuous temptations from Jeremias and Eugenius--

There now, he was lost again. Jeremias and Eugenius were--? Oh, yes, the
"philadelphians" or brotherly lovers (another crime hidden there, no
doubt) at the beginning of the case, consanguineous to the lowest degree
with both Felicia and Honuphrius--the latter the apparent prime villain and
husband of Anita. It was Magravius, who seemed to admire Honuphrius, who
had been urged by the slave Mauritius to solicit Anita, seemingly under
the aegis of Honuphrius himself. This, however, had come to Anita through
her tirewoman Fortissa, who was or at one time had been the common-law
wife of Mauritius and had borne him children--so that the whole story had
to be weighed with the utmost caution. And that entire initial confession of
Honuphrius had come out under torture--voluntarily consented to, to be sure,
but still torture. The Fortissa-Mauritius relationship was even more dubious, really
only a supposition of the commentator Father Ware--
7
"Ramon, give me a hand, will you?" Cleaver shouted suddenly. "I'm stuck,
and--and I don't feel well."

The Jesuit biologist arose in alarm, putting the novel aside. Such an
admission from Cleaver was unprecedented.

The physicist was sitting on a pouf of woven rushes, stuffed with a
sphagnumlike moss, which was bulging at the equator under his weight. He
was half-way out of his glass-fiber jungle suit, and his face was white
and beaded with sweat, although his helmet was already off. His uncertain,
stubby fingers tore at a jammed zipper.

"Paul! Why didn't you say you were ill in the first place? Here, let go of
that; you're only making things worse. What happened?"

"Don't know exactly," Cleaver said, breathing heavily but relinquishing
the zipper. Ruiz-Sanchez knelt beside him and began to work it carefully
back onto its tracks. "Went a ways into the jungle to see if I could spot
more pegmatite lies. It's been in the back of my mind that a pilot-plant
for turning out tritium might locate here eventually--ought to be able to
produce on a prodigious scale."

"God forbid," Ruiz-Sanchez said under his breath.

"Hm? Anyhow, I didn't see anything. A few lizards, hoppers, the usual
thing. Then I ran up against a plant that looked a little like a
pineapple, and one of the spines jabbed right through my suit and nicked
me. Didn't seem serious, but--"

"But we don't have the suits for nothing. Let's look at it. Here, put up
your feet and we'll haul those boots off. Where did you get the--oh. Well,
it's angry-looking, I'll give it that. Any other symptoms?"

"My mouth feels raw," Cleaver complained.

"Open up," the Jesuit commanded. When Cleaver complied, it became evident
that his complaint had been the understatement of the year. The mucosa
inside his mouth was nearly covered with ugly and undoubtedly painful
ulcers, their edges as sharply defined as though they had been cut with a
cookie punch.

Ruiz-Sanchez made no comment, however, and deliberately changed his
expression to one of carefully calculated dismissal. If the physicist
needed to minimize his ailments, that was all right with Ruiz-Sanchez. An
alien planet is not a good place to strip a man of his inner defenses.

"Come into the lab," he said. "You've got some inflammation in there."

Cleaver arose, a little unsteadily, and followed the Jesuit into the
laboratory. There Ruiz-Sanchez took smears from several of the ulcers onto
microscope slides, and Gram-stained them. He filled the time consumed by
the staining process with the ritual of aiming the microscope's substage
mirror out the window at a brilliant white cloud. When the timer's alarm
went off, he rinsed and flame-dried the first slide and slipped it under
the clips.

As he had half-feared, he saw few of the mixed bacilli and spirochetes
which would have indicated a case of ordinary, Earthly, Vincent's
angina--"trench mouth," which the clinical picture certainly suggested, and
which he could have cured overnight with a spectrosigmin pastille.
Cleaver's oral flora were normal, though on the increase because of all
the exposed tissue.

"I'm going to give you a shot," Ruiz-Sanchez said gently. "And then I
think you'd better go to bed."

"The hell with that," Cleaver said. "I've got nine times as much work to
do as I can hope to clean up now, without any additional handicaps."

"Illness is never convenient," Ruiz-Sanchez agreed. "But why worry about
losing a day or so, since you're in over your head anyhow?"

"What have I got?" Cleaver asked suspiciously.

"You haven't got anything," Ruiz-Sanchez said, almost regretfully. "That
is, you aren't infected. But your 'pineapple' did you a bad turn. Most
plants of that family on Lithia bear thorns or leaves coated with
polysaccharides that are poisonous to us. The particular glucoside you ran
up against today was evidently squill, or something closely related to it.
It produces symptoms like those of trench mouth, but a lot harder to clear
up."

Amazon.com Review

The citizens of the planet Lithia are some of the most ethical sentient beings Father Ramon Ruiz-Sanchez has ever encountered. True, they have no literature, no fine arts, and don't understand the concept of recreation, but neither do they understand the concepts of greed, envy, lust, or any of the sins and vices that plague humankind. Their world seems darned near perfect. And that is just what disturbs the good Father.

First published in 1959, James Blish's Hugo Award-winning A Case of Conscience is science fiction at its very best: a fast-paced, intelligent story that offers plenty of action while at the same time explores complex questions of values and ethics. In this case, Blish has taken on the age-old battle of good vs. evil. Lithia poses a theological question that lies at the heart of this book: is God necessary for a moral society? The Lithians are nothing if not moral. Not only do they lack the seven deadly sins, they also lack original sin. And without any sort of religious framework, they have created the Christian ideal world, one that humans would be eager to study and emulate. But is it too perfect? Is it in fact, as Father Ruiz-Sanchez suspects, the work of The Adversary? And what role does Egtverchi, the young Lithian raised on Earth, play? Is he an innocent victim of circumstance, or will he bring about the Dies Irae, the day of the wrath of God, upon the earth? The fate of two worlds hinges on the answers to these questions, and will lead to an ancient earth heresy that shakes the Jesuit priest's beliefs to their very core.

A Case of Conscience is a brilliant piece of storytelling, and it packs a lot into a scant 242 pages. Most readers will probably finish the book in one sitting, unable to stop until the spectacular denouement. But the questions posed by this little-known gem will stay with you for days afterward. --P.M. Atterberry

From the Inside Flap

Father Ruiz-Sanchez is a dedicated man--a priest who is also a scientist, and a scientist who is also a human being. He has found no insoluble conflicts in his beliefs or his ethics . . . until he is sent to Lithia. There he comes upon a race of aliens who are admirable in every way except for their total reliance on cold reason; they are incapable of faith or belief.

Confronted with a profound scientific riddle and ethical quandary, Father Ruiz-Sanchez soon finds himself torn between the teachings of his faith, the teachings of his science, and the inner promptings of his humanity. There is only one solution: He must accept an ancient and unforgivable heresy--and risk the futures of both worlds . . .

Father Ruiz-Sanchez is a dedicated man--a priest who is also a scientist, and a scientist who is also a human being. He has found no insoluble conflicts in his beliefs or his ethics . . . until he is sent to Lithia. There he comes upon a race of aliens who are admirable in every way except for their total reliance on cold reason; they are incapable of faith or belief.

Confronted with a profound scientific riddle and ethical quandary, Father Ruiz-Sanchez soon finds himself torn between the teachings of his faith, the teachings of his science, and the inner promptings of his humanity. There is only one solution: He must accept an ancient and unforgivable heresy--and risk the futures of both worlds . . .

**