Genius by Jesse Kellerman

A successful young NYC art dealer named Ethan Muller discovers a vast series of bizarre drawings in an abandoned apartment in Queens, and the unknown genius who created them quickly becomes the toast of the contemporary art world. But Ethan soon has cause for alarm--a retired cop sees one of the drawings in the newspaper and recognizes the little boy in it as a long-ago victim of a serial killer who was never caught. Could the phantom artist and the phantom murderer be one and the same? Ethan Muller is determined to get to the bottom of the mystery. And someone else is just as determined to keep the secret buried....

I listened to this on CD and really enjoyed the storytelling. It is a mixture of mystery with discovering a family's history and secrets. Very satisifactory ending.