Xavier, Brad, and Yadina are off on a fossil hunt with paleontologist Mary Anning! She helps them learn that when you start something it feels good to finish it.

At head of title: Xavier Riddle and the secret museum. "PBS Kids"--Cover "Based on the best-selling series by Brad Meltzer and illustrated by Christopher Eliopoulos"--Cover "Based on: Ordinary people change the world"--Back cover "PBS Kids"--Cover.