Stallion by Starlight (Magic Tree House Merlin Mission Series #21)

If kids get hooked on Magic Tree House, they're hooked on reading! This is one series that kids, teachers, librarians, and parents all agree on. A perfect blend of magic, adventure, history, science, danger, and cuteness—the topics range from kid pleasers (pirates, the Titanic, pandas) to curriculum perfect (rain forest, American Revolution, Abraham Lincoln) to seasonal shoe-ins (Halloween, Christmas, Thanksgiving). Magic Tree House #49 features Jack and Annie heading back to ancient Greece and an adventure with Alexander the Great when he was a child and his famous stallion: Bucephalus.