Secret of the Old Bones, Paperback

This mystery story for young readers deals with an issue that is becoming more important in the scientific community: the illegal excavation and sale of dinosaur fossils. In this book, four friends accidentally discover some old bones that have recently been dug up, but are hidden out of sight. Something about these bones and the way they have been hidden seems really strange to the four friends, and they decide that it is up to them to discover the truth about the old bones.