Blood Test

A gripping thriller from Sphere that'll keep you turning pages well past bedtime. Blood Test delivers exactly what you want from a mystery: tension that builds with every chapter, characters you can't quite trust, and a plot that refuses to give up its secrets easily. The kind of book that makes you forget about everything else until you've reached that final, satisfying page. Perfect for fans of taut psychological suspense and anyone who loves a mystery that keeps them guessing.