Eight-year-old Jack and his younger sister Annie find a magic treehouse. Each book in the collection takes them to different places.

Tonight on the Titanic: The magic tree house transports Jack and Annie to the deck of the Titanic to find a mysterious gift that will free a small dog from a magic spell. Buffalo before breakfast: The magic tree house takes Jack and his sister Annie to the Great Plains where they learn about the life of the Lakota Indians. Tigers at twilight: Having used their magic tree house to travel to India, where they must get a gift to help free the dog Teddy...

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.

"Jack and Annie use the magic tree house to travel back in time to 1947 Brooklyn, New York, where they pretend to be batboys at Jackie Robinson's first game with the Brooklyn Dodgers against the Boston Braves"--

"Jack and Annie are about to meet the fiercest warriors of all--the soldiers of the ancient Roman legion! When the magic tree house whisks them back to a ROman army camp, they learn their mission: Be like warriors. That is easier said than done--Roman soldiers are the best fighters in the world! When Jack and Annie find themselves in the wrong place at the wrong time, they're in big trouble. Who will save Jack and Annie?"--Page [2] of cover.

"The magic tree house whisks Jack and Annie away to South America, where they must climb Machu Picchu to save a baby llama."--

"When the magic tree house whisks Jack and Annie back in time, they land in the tallest tree in Yosemite, California where they join nature conservationist, John Muir, and US President Teddy Roosevelt on a historic trip through the woods"--

Carnival at candlelight: Merlin has asked Jack and Annie to help on another Merlin Mission. This time they head back into history to Venice, Italy, in the 1700s. With the help of some new friends, a research book, and a mysterious rhyme from Merlin, the heroes will save the beautiful city from a flood! Season of the sandstorms: Armed only with a research book and a book of magic rhymes, Jack and Annie to back 1,200 years to the Golden Age of Baghdad....

"The magic tree house whisks Jack and Annie away to Greenland where they discover they've traveled back in time to meet Lief Erikson"--

Jack and Annie join Merlin on a magical mission to King Arthur's castle at Camelot, a haunted castle, fight a giant sea serpent, and travel to the land of snow.