Retells, in graphic novel form, the tale of eight-year-old Jack and his younger sister Annie, who find a magic treehouse which whisks them back to an ancient time zone where they see live dinosaurs.

When a father stays up late on Christmas Eve to assemble toys, he is amazed to see eight huge dinosaurs land on the roof and a T-Rex come down the chimney.

The dinosaurs enjoy a variety of Christmas activities, including decorating the town, holding a parade, and receiving gifts from Santa Claws.

Illustrations and rhyming text reveal the Mighty Underpants War as the true reason dinosaurs are extinct.

At first, the dinosaurs try to bring home all manner of wild beasts, but in the end, they learn to bring home an appropriate animal from a shelter or pet store and to love and care for it with attention.

On Christmas Eve, a young dinosaur wishes that he could help Santasaurus deliver presents around the world.

A Tyrannosaurus rex tries his best to fill in for the sick Easter Bunny.

Presents a variation of the classic Christmas tale as the dinosaur fossils in the museum come to life, sing, and dance; and includes a CD with dinosaur Christmas music and story.