It's been almost a year since Greenbury's last murder. Detective Peter Decker has been enjoying the slower pace of life in upstate New York ... until two local kids , find a dead body in the woods. .Identifying the victim takes Decker and his former partner Tyler McAdams into the cryptic world of mathematics at Kneed Loft College: a sphere of scheming academics - including a beguiling student who sets her sights on McAdams - and a dangerous underworld. .It will take all of Decker's wits and McAdams's intellect to solve a twisted tale created by depraved masterminds, and then make it out alive ... . . . .