Beka Cooper is no longer a Puppy. She's a Dog now - a full-fledged member of the Provost's Guard, which keeps the peace in Corus's streets. Beka's natural skills of observation and tenacity are augmented by her unusual magical talents, which allow her to gather information both from pigeons are from the eddies of dirt and dust that swirl on street corners. But even her magic isn't very useful when unrest comes to Tortall's capital in the form of counterfeit coins, which turn up in shops all over the city. Merchants raise prices to cover their losses, and with winter coming on, hikes in food and fuel costs could spell disaster - most of all for the city's poor.

The Dogs discover that gamblers are bringing the counterfeits from Port Caynn - and that the Port Caynn Dogs don't seem to be doing anything about it. Beka and her mentor, Clary Goodwin, are chosen to go undercover in Port Caynn and find out what they can. And wherever Beka goes, so do some of her animals. Departing from Corus with her are the scent hound Achoo, who has been newly assigned to Beka, and the pigeon Slapper, who carries the voices of the dead.

In Port Caynn, Beka and Goodwin delve deep into the gambling world. There Beka meets a charming bank courier, who may be involved in the counterfeiting ring. Things come to a head just as Goodwin returns home to report in Corus. It won't be enough to Beka to be her usual "terrier" self. She'll have to learn from Achoo to sniff out the criminals - to be a bloodhound.

From School Library Journal

Grade 7 Up—Fans of Pierce's medieval fantasy police-procedural series will love this book as much as Terrier (Random, 2006). Beka, 17, is serving her first year as a Dog (police officer) in the Provost's Guard. She and her mentor and old partner, Goodwin, are sent from Corus to Port Caynn to try to discover the source of the counterfeit silver coins that are flooding the region, causing soaring grain prices and riots in Corus. Beka is accompanied by Achoo, the scent hound she rescued from its abusive handler. While in Port Caynn, she and Goodwin tangle with Pearl, Queen of the Thieves, and her crew. Beka falls for Dale, a handsome and charming gambler and bank courier who may be in league with Pearl. The action drags a bit in the middle to focus on the romance but makes up for it in the end. Pierce vividly imagines this world in which police procedures are different, yet similar to those of today. Ponce, Beka's wise cat, who is also a God, is mostly absent but Beka's other unusual magical sources of information-pigeons inhabited by talking ghosts of the dead and spirits in spinning dust funnels—continue to add to the series' appeal. Beka is as headstrong and feisty as ever and frequently makes errors in judgment but is willing to learn from her mistakes. She truly earns the nickname Bloodhound as she faithfully narrates her story through journal entries.—Sharon Rawlins, New Jersey State Library, Trenton
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From Booklist

Readers unfamiliar with the first book in the Beka Cooper trilogy, Terrier (2006), will be temporarily confused by this follow-up’s cast of characters and colorful slang, such as “cove” for man and “mot” for woman, but this teen police procedural stands on its own. Sixteen-year-old rookie policewoman Beka and her temporary partner, Clary, are sent to Port Caynn to investigate the source of counterfeit coins that have begun to appear in the markets and taverns. The wealth of detail, shared in diary format, occasionally threatens to overwhelm the book’s pacing and action, but quirky, endearing characters save the story. Grades 6-8. --Cindy Welch