Ms. Frizzle orders skeleton costumes for her class, and they discover that some of the bones are missing. When they head out to look for them, they learn something about their own skeletons.

A mysterious beast is terrorizing the resident skeletons of Bonesville by stealing a different bone from each townsperson, so Detective Sherlock Bones traps the monster to learn the truth about this bone thief.

Made from bone dust and imagination, Irreélle accidentally destroys another of Miss Vesper's creations and flees to the underside of the graveyard, seeking the magic that brings bones to life.

When Buster comes to live at Roger's house as a shy puppy, he has a lot to learn. Thank goodness Phoebe, an older and wiser dog, is there to teach him a few tricks. Top dog Phoebe has a plan to teach Buster how to collect and train bones to stay. Why then are Buster's bones mysteriously disappearing? Buster may be young and somewhat gullible, but he's also good-hearted, generous, and smart enough to figure out the mystery on his own. He also learns...

When his juicy T-bones disappear before he has a chance to enjoy them, Hank the Cowdog is convinced that a Bone Monster is loose on the ranch and determines to put a stop to its devious activities.

"Introduce your little ones in both English and Spanish to the strong bond between a human and their pet -- and how one passing away will never do them apart! Huesos is Abuelo's four-legged travieso, a rambunctious troublemaker with a constant ball of energy and a big bite. Nothing and no one is safe from Huesos' mischief and chomping teeth, from Grandpa's slippers to the neighborhood's mailman. Until one day, Calaca Pascuala knocks on his door and...