Publisher's Weekly
Edgar-winner Hallahan ( Catch Me: Kill Me and Foxcatcher ) attempts to grapple, in fiction, with serious breaches of national security--the Soviet procurement of American high-tech secrets. Told with little style or humor, his novel takes shape as a plot in search of characters. When two agents lose yet another piece of American high-tech hardware to Soviet smugglers, Charlie Brewer is called in to protect the Cassandra project, a hardware/software package designed to enhance the nation's defensive computer systems. Early in his investigation, Brewer learns that the rash of thefts is the work of one brilliant man. By blackmailing disreputable American defense contractors and falsifying elaborate paper trails, Emil Gogol has managed to steal the latest developments in American defense technology. Arrogant and disdainful of his bureaucratic superiors, he knows that seizing the Cassandra project could be his ultimate coup. Failure, on the other hand, would ruin him. Just as Gogol prepares to make the heist, Brewer learns of his scheme. Though it is carefully thought out and tightly plotted, the novel's weak characterizations, particularly of the two central figures, fail to make this a convincing, let alone compelling, work of fiction.

Library Journal
Charlie Brewer is back and confronted with international high-tech espionage and with materiel smuggling orchestrated by a superior Russian agent. The stolen weaponry and computer technology mean American forces are pitted against products of U.S. research and development. Eschewing his former boss's job within the established intelligence community, Brewer fights against time and security leaks to learn the Russian agent's identity and how the crimes are accomplished, and also to prevent the theft of the ultimate Russian target: Cassandra--a defense software. Tripletrap is not as well written as the Edgar award-winning Catch Me: Kill Me --some of the signature Hallahan plot twists seem contrived, and the suspense is unevenly sustained. But Brewer fans will want to read it anyway.-- V. Louise Saylor, Eastern Washington Univ. Lib., Cheney