The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! It's a treasure trove of trouble

The magic treehouse whisks Jack and Annie back to the days of deserted islands, secret maps, hidden gold, and nasty pirates.

Travel with Jack and Annie to the deep, dark ocean to encounter the stealthiest of underwater predators: the shark! Jack and Annie are going on vacation! Or so

The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! Vampire bats and killer ants? Th