The magic tree house takes Annie and Jack to Pompeii just as Vesuvius is about to erupt, and they must find a Roman scroll before everything is covered with burning ash.
Jack and Annie continue to try helping Merlin the magician by searching for the secrets of happiness, and their magic tree house takes them to Antarctica, a wasteland where the penguins may know what to do.
Collects "Soccer" and "Soccer on Sunday" in which Jack and Annie search for the fourth secret of greatness for Merlin the Magician in Mexico City at the 1970 World Cup Games where they hope to learn something new from soccer player great, Pele.
Collects "Pirates" and "Pirates Past Noon," in which the magic tree house whisks Jack and Annie back to the days of deserted islands, secret maps, hidden gold, and nasty pirates.
Collects "Horse Heroes" and "Stallion By Starlight" in which Jack and his younger sister Annie travel in their magic treehouse to ancient Greece where they meet Alexander the Great and help tame his wild stallion.
Collects "Penguins and Antarctica" and "Eve of the Emperor Penguin" in which Jack and his younger sister Annie continue to help Merlin the magician search for the secret of happiness by traveling in their magic treehouse to Antarctica, a wasteland where the penguins may know what to do.
Collects "Ghosts" and "A Good Night for Ghosts" in which Jack and Annie must travel back in time to New Orleans in 1915 to help a teenaged Louis Armstrong fulfill his destiny and become the "King of Jazz.".
