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

"It's the night before Christmas but Andy and Terry aren't ready yet! They haven't written their letters to Santa, they haven't sung any carols or hung their stockings, and now Mr. Big Nose wants their next book done by tomorrow. When Santa Claus's sleigh crash-lands in the treehouse, the reindeer become tangled in the branches and Santa falls into the cloning machine. With dozens of Santas running around and no way to tell which one's the real one,...

"The magic tree house is back with a message from Morgan le Fay telling Jack and Annie to seek out the Gray Ghost and listen to her story, and immediately they are whisked away to Nepal where they meet Tenzin, a climber who has recently lost his family, and who takes them up the mountain to meet a snow leopard and renew himself"--Title verso page.

Eight-year-old Jack, his seven-year-old sister, Annie, and Peanut the mouse ride in a tree house to the Amazon rain forests, where they encounter giant ants, flesh-eating piranhas, hungry crocodiles, and wild jaguars.

While on a mission to prove to Merlin that they can use magic wisely, Jack and Annie travel to seventeenth-century Venice, Italy, to save the city from disaster. 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! Yet another...

"Nine-year-old besties Nour and August stumble upon the perfect place for their dream hideaway--a hidden garden full of majestic trees. Excited to build a tree house, they design blueprints, research plant care, and collect necessary tools and materials. What was intended to be a secret hideaway becomes the perfect place for a once-hidden garden to come to life for their families to celebrate a very important birthday . . . and a long-lost friendship....