The Clock Without a Face is puzzle book by Eli Horowitz and Mac Barnett with illustrations by Scott Teplin.

The plot of the book revolves around the theft of 12 jeweled numbers from the face of the Emerald Khroniker, a cursed clock, with clues to the thief's identity and the whereabouts of the numbers included throughout the text and in accompanying pictures.

The identity of the thieves is revealed on the last page, but the location of the treasure is not.

The authors hid 12 actual emerald-studded numbers (crafted by Anna Sheffield) in locations around the United States, and readers are encouraged to search for them using the clues in the book.

You can help Wikipedia by expanding it.This article about mystery fiction is a stub.