The book is based on a true story involving the author’s husband when he was a boy and family friend Albert Einstein. When Theo and Professor Einstein go out for a sail on Theo’s small boat, the Professor unexpectedly loses his compass overboard. Can Theo save the day?

These highly authentic watercolours perfectly capture the atmosphere of the 1930s Europe, and the text provides an insight into the mysteries of physics that inspired Einstein’s quest to understand the forces of nature.