Henry is excited when his Uncle Jake builds him a tree house but worries that his dog Mudge will not be able to enjoy it with him.

In their magic treehouse, Jack and Annie are again transported to King Arthur's realm, where invisible beings, giant ravens, and mistaken magic spells have a duke's castle in an uproar on Halloween night.

Jack and Annie are transported by their magic tree house to the time of the Civil War where they meet Clara Barton.

When Jack and Annie travel back to the Kansas prairie in search of "something to learn," they gain an understanding of how hard life was for pioneers and they experience the terror of a tornado.

Using their magic tree house, Jack and Annie travel back to the time of the American Revolution and help General George Washington during his famous crossing of the Delaware River. George Washington prepara su ejército para atacar al enemigo por sorpresa. Debido al mal tiempo, el general duda si debe continuar con sus planes. ¿Podrán Annie y Jack lograr que la historia siga su curso? ¡El destino de Estados Unidos está en manos de ellos dos!

Annie y Jack viajan a la década de 1870, en la casa del árbol. Al llegar, aterrizan sobre la pradera, cerca de una escuela que sólo tiene un aula. Allí conocen a la maestra, una joven adolescente, a unos niños muy simpáticos y a otro niño más grande, y peleón. ¡Pero lo más duro y aterrador todavía está por venir! ¡Un tornado! When Jack and Annie travel back to the Kansas prairie in search of "something to learn," they gain an understanding...

Fifth-grader Winnie, with notes from her friends, writes of turning her treehouse into an embassy after her newly-divorced parents become unreasonable, where she is joined by nine others with complaints.

Eight-year-old Jack and his younger sister Annie find a magic treehouse, which whisks them back to an ancient time zone where they see live dinosaurs.

The magic treehouse takes Jack and Annie back two thousand years to ancient China where they must find the original copy of an old legend before the Imperial Library is burned down by the evil Dragon King.

When his dad builds him a tree fort, Russell thinks it is perfect--right up until he notices another tree fort going up three houses over.--from Publishers description.