From the publisher: "'Ninety percent of who you are is invisible.' Amedeo Kaplan seems just like any other new kid who has moved into the town of St. Malo, Florida. But Amedeo has a secret, a dream: More than anything in the world, he wants to discover something -- a place, a process, even a fossil -- some treasure that no one realizes is there until he finds it. For Mrs. Zender's mansion is crammed with memorabilia of her long life, and there is a story to go with every piece. Soon the boys find themselves caught up in one particular story -- a story that links a sketch, a young boy's life, an old man's reminiscence, and a painful secret dating back to the outrages of Nazi Germany. Two-time Newbery winner E. L. Konigsburg spins a magnificent tale of art, discovery, friendship, history, and truth."