I discovered these books at my local library, and I'm so glad I did! They're a series of 35 "Interactive History Adventure" books (think "Choose Your Own Adventure") by Capstone Publishers. Most of the history topics covered pertain to American history, but there are quite a few from early World history as well. What a perfect way to get a child excited about learning history! And I can think of no better way to learn history than to experience it firsthand and discover for yourself what the consequences of various choices are - after all, isn't that why we study history in the first place? Ds9 loves them, and I highly recommend them! Note: I would estimate that these books would hold the interest of little boys and girls anywhere from 8-13.
There are now (39) books in this list, not counting the survival series. Below are corrected, updated links. There are 8 "Era" adventure books are for grades 3-7, covering the ancient cultures of China, Egypt, Greece, Rome, colonial America, the Great Depression, and the Middle ages. There are 26 "History" adventure books, also for grades 3-7, covering topics mainly having to do with battles, wars, exploration, immigration. There are 5 books in the "Warriors" series, same grade level: Gladiator, Knight, Ninja, Samurai, Viking. There are also 8 books in the "Survival" series (think "Bear Grylls for kids"). :)