Eleven-year-old Abigail Jane Stewart records the despair and hope of the difficult winter between 1777-1778--when she witnessed George Washington readying his young soldiers on the frozen fields of Valley Forge.

    In their tiny home, matchboxes double as roomy dressers and postage stamps hang on the walls like paintings. Whatever the Clocks need they simply "borrow" from the "human beans" who live above them. It's a comfortable life, but boring if you're a kid. Only Pod is allowed to venture into the house above, because the danger of being seen by a human is too great. Borrowers who are seen by humans are never seen again. Yet Arrietty won't listen. There is a human boy up there, and Arrietty is desperate for a friend.

    But when his world suddenly interlocks with an eccentric, bookish girl and a bitter old man who runs a toy booth in the station, Hugo's undercover life, and his most precious secret, are put in jeopardy. A cryptic drawing, a treasured notebook, a stolen key, a mechanical man, and a hidden message from Hugo's dead father form the backbone of this intricate, tender, and spellbinding mystery.

    Their goal is to stay together, and in the process they find a grandfather.

    (And you, dear reader, can test your wits right alongside them.) But in the end just four very special children will succeed. Their challenge: to go on a secret mission that only the most intelligent and resourceful children could complete. To accomplish it they will have to go undercover at the Learning Institute for the Very Enlightened, where the only rule is that there are no rules. As our heroes face physical and mental trials beyond their wildest imaginations, they have no choice but to turn to each other for support. But with their newfound friendship at stake, will they be able to pass the most important test of all?This tenth anniversary edition of The Mysterious Benedict Society includes over thirty pages of bonus materials that will delight old and new fans alike.