I'm reading a good one at the moment, it's called "Anne Boleyn" by Joanna Denny. It dispells all the myths about Anne Boleyn (who was, of course, Henry VIII's second wife who was beheaded). Historically, she has been misrepresented as being a whore, a witch and a seductress who clawed her way to become Queen. But, just to quote the blurb, she was actually "highly literate, accomplished, intellectual and a devout Protestant." Majority of what we are told about her, is actually lies spread by her enemies - the book goes into detail disproving these lies and highlights her true character, as well as exposing the truth behind the charges that led to her execution.