Alchemist (Touché, #2)

Hiro Morrison, a genius child of Japanese-American descent, accidentally meets Detective Samuel Hudson of the New York Police Department and his daughter, Karen, during a murder case. Hiro, who has the ability to read the chemical identity of any object he touches, is eventually contracted to become a consultant for the New York Police Department.

At one point, a series of bombings occur, and Hiro's abilities are needed more than ever. At the same time, someone emerges who seems to know about his ability. The bombing case and his encounter with this person change everything, altering Hiro's life forever.