Your Tudor Tutor
Today would be the 501st anniversary for King Henry VIII and his first wife, Catharine of Aragon. I'm not sure what the correct present is for that specific anniversary, but I don't know that I'd be accepting whatever it would be from Henry.
King Henry VIII has fascinated many people, though, regrettably, mostly because of his six marriages (two of which ended in divorce, and two more in beheading). However, it may interest you that these are not his only...accomplishments.
Some notable books on the Tudor king which do not focus on his matrimonial issues include The Last Divine Office: Henry VIII And The Dissolution Of The Monasteries and Henry VIII: The King And His Court.
Of course, there are also historical fiction books that contain the infamous king. While they are not necessarily as accurate as the non-fiction, they are just as entertaining, if not more so. The oldest of these would be Shakespeare's play, given the regal name Henry VIII. Among the more recent, there is the "autobiography" by Margaret George, as well as the well-known The Other Boleyn Girl by Philippa Gregory. Though, my personal favorite is not a book at all, but the Showtime television series The Tudors.
You may even want to take a look at his children. Each one showed off one bit of his overbearing personality. And I can guarantee one of them is probably just as interesting as he was.