Mighty adventurer of the planet Book

Two weeks ago she was a soccer queen; now she's been sidelined by a broken arm. Beryl's "sooooooooooooo bored, until her stepfather suggests she become a "Mighty Adventurer of the Planet -- dedicated to solving mysteries and finding adventures. Now Beryl and her new best friend, Mary P., are going behind the scenes at the natural history museum, where their help is desperately needed by a team of scientists hunting for a missing dinosaur bone.