When you purchase the Library Bound mystery you will receive FREE online eBook access Carole Marsh Mystery Online eBooks are an easy, effective, and immediate way to read your favorite Carole Marsh Mystery on the go Each web-hosted Online eBook is filled with the same exact pages as the book, plus additional features like pages that "flip" with a fun sound as you read, a full chapter directory, full-screen and thumbnail viewing capabilities, and more My, oh Maya Mimi, Papa, Christina, and Grant really get in over "skulls" in this Mexican hat dance of a mystery set in the Yucatan Peninsula. When they go to explore ancient Maya ruins, "number" clues seem to abound But what is someone trying to lead them to or wary from? Snakes human hearts a wall of skulls human sacrifice? How creepy can you get, the kids wonder. But in searching for clues, they encounter the wonder that is Mexico and find themselves laughing at things they never thought could be funny.