One day, a boy named Theo is called into the living room by his parents to meet "the most famous man alive." When Theo and Professor Einstein go out for a sail on Theo's small boat, the Professor unexpectedly loses his compass overboard. Fortunately, Theo manages to save the day -along with the compass! The author's husband was a personal friend of Albert Einstein's. The lovely watercolors perfectly capture the atmosphere of the story and the text provides an insight into the mysteries of physics that inspired Einstein's quest to understand the forces of nature.