Brendan Lynch

A young scientist, to the amazement and disbelief of his colleagues and other experts, has perfected a machine that lets him live one of mankind's oldest dreams--to live in times other than his own.

Tom Canty and Edward Tudor alike, but their lives could hardly be more different. For Edward is a royal prince, heir to the throne, and Tom is a miserable pauper. Until one day, fate intervenes, and for awhile each has to live the other's life.