When the magic tree house takes Jack and Annie back to World War II, Europe is in trouble! It is June 1944 and the brother-and-sister team must go behind enemy lines and crack a code that could save a lot of lives. But this is war, and Jack and Annie might just be in the wrong place at the wrong time. Can they save everyone before the great battle of D-Day begins? They don't know, but they have to try!

Previously published in hardcover as Magic Tree House Super Edition #1: Danger in the Darkest Hour.

Have more fun with Jack and Annie on the Magic Tree House(R) website at MagicTreeHouse.com.

Did you know there's a Magic Tree House book for every reader? Find the perfect book for you:

Magic Tree House(R) Classics Adventures with Jack and Annie, perfect for readers who are just starting to read chapter books. F&P Level M.

Magic Tree House(R) Merlin Missions More challenging adventures for the experienced Magic Tree House(R) reader. F&P Level N.

Magic Tree House(R) Super Edition: A longer and more dangerous adventure with Jack and Annie. F&P Level P.

Magic Tree House(R) Fact Trackers Non-fiction companions to your favorite Magic Tree House(R) adventures. F&P Levels N-T.