From its tongue-in-cheek title to its melding of romance and zombie-killing action, there's little in Sinclair's newest sci-fi romance (following Games of Command) that doesn't surprise, grip or entertain. The story's premise: artificially engineered creatures with razor-sharp claws and bodies covered in wriggling “energy worms” have gone rogue, dispersing across solar systems to breed and kill. It's up to alien soldiers like Lt. Jorie Mikkalah, essentially high-tech humans from another planet, to disable them. Jorie's search leads her to present-day Earth, where she must outsmart a glut of zombies holed up in Florida and rely on whip-smart detective Theo Petrakos for a base of operations, a convenient cover and a steady stock of “glorious” peanut butter. The narrative bounces easily from zombie attack to a visit with Theo's matchmaking neighbor, from military strategizing to tender moments between Theo and Jorie. This strange mesh of elements, held together by Sinclair's strong characterizations and methodical plotting, makes the book an unexpected treat. Though it may prove too light for sci-fi enthusiasts, fans of romance and fantasy hunting for edgier fare can stop singing the blues. (Dec.)