Magic Tree House #50: Hurry Up, Houdini! features Jack and Annie and legendary magician, Harry Houdini! Magic Tree House #51: Nightmare on the Nile features Jack and Annie back in Egypt, still seeking the secrets of greatness for Merlin. This time they will meet the great nurse, Florence Nightingale, on her trip to Egypt that served as the inspiration for her choices that made her both famous and beloved.