From the cover:

Only one man in the NYPD can tackle this high-profile case: Detective Michael Bennett. A calculating murderer called The Teacher is terrorizing New York City's powerful, arrogant elite. Rich people must mind their manners...or die. For anyone else, the pressure would be overwhelming, but Mike is ready. Taking care of his ten children has prepared him for the job! With his hands already full--his kids have all caught a virulent flu--he must now track down the killer. As a secret pattern emerges in the Teacher's lessons, Detective Bennett has just a few precious hours to save New York from the greatest disaster in its history.

OK, so the ending was kind of predictable. But the story was good, and kept me turning pages, so I enjoyed it!