The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system Beware of avalanchesWhen the magic tree house whisks Jack and Annie back in time to the highest pass in the Swiss Alps, they discover an ancient monastery filled with monks and Saint Bernard dogs. Annie cant resist offering to train a wild young dog named Barry, but he is quite the handfulBefore the night is over, Jack and Annie will be forced to use some crazy magicFormerly numbered as Magic Tree House #46, the title of this book is now Magic Tree House Merlin Mission #18: Dogs in the Dead of Night. Did you know that theres a Magic Tree House book for every kid? Magic Tree House: Adventures with Jack and Annie, perfect for readers who are just beginning chapter books Merlin Missions: More challenging adventures for the experienced reader Super Edition: A longer and more dangerous adventure Fact Trackers: Nonfiction companions to your favorite Magic Tree House adventures Have more fun with Jack and Annie at MagicTreeHouse.com