The Skull — S.D. Tooley

Three 13-year-olds dabble in "CSI" to reveal a town's long-kept secret. The hardcover version of the first in the Remy and Roadkill Series. To help practice facial reconstruction, Remy purchases a monkey skull at an estate sale. Curious how the animal died, she enlists the aid of the school's outcast -- a teen with a strange fascination in dead animals. They team up with a runaway and together take a job in the mansion's library. But they have more than shelving books on their minds, because when Remy completed her reconstruction, she discovered that the skull wasn't from an animal. There are others who know the skull is human. And there is one person who will stop at nothing to keep its identity a secret.