The hunt for the famous Cutter Treasure leads Cecilia, Leo, Une and Une’s dog Egon to a startling discovery behind a hidden wall in an abandoned countryside home in Schooner Cove. Their find gains great attention both from television and newspapers, and guest after guest shows up knocking at the doors to The Pearl. But as the number of visitors grow, so does the number of strange happenings in town. To solve the mystery of the Cutter Treasure, the friends will have to solve another riddle, one involving bones as well as skulls.

In The Skull Mystery the reader will at long last be given the answer to the mystery that has puzzled the CLUE gang for some time: where the Cutter Treasure is, and what it contains. But first, the mystery of the skull riddle must be unraveled.

The CLUE series’ name comes from the first letter in each protagonist’s name: Cecilia, Leo, Une, and Une’s dog Egon. In each of the series’ books a new mystery and a new ethical question is introduced along with the thoughts of one of the world’s most well-known philosophers. The CLUE books are best selling crime fiction for younger readers aged 9-12.