Mac Barnett & Eli Horowitz~ May 13

The rumors are true. The Emerald Khroniker has been stolen from the penthouse of Ternly Tower. We have reason to believe that the twelve jeweled numbers have been stashed across the country."

That's where you come in - solve the mystery and the jewels are yours! REALLY!

Mac Barnett & Eli Horowitz introduce The Clock Without a Face. Come and get the latest scoop.

Born to non-farmers in a California farming community, Mac Barnett now lives near San Francisco. He's on the board of directors of 826LA, a nonprofit writing center for students in Los Angeles, an he founded the Echo Park Time Travel Mart, a convenience store for time travelers.

Eli Horowitz is the managing editor and publisher of the Dave Eggers'-founded publishing concern McSweeney's.

Best for readers born before 2001 but after 1903.