The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! Are you ready for a presidential adventure? Jack and Annie are! They are whisked back to Washington, D.C., in 1861. Jack can&;t wait to meet Abraham Lincoln himself! But the new president is too busy to see them, as he is desperately trying to save a nation in crisis. It&;s a race against time as Jack and Annie try to aid a president and a troubled nation!Formerly numbered as Magic Tree House #47, the title of this book is now Magic Tree House Merlin Mission #19: Abe Lincoln at Last! Did you know that there&;s 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!