'The Queen's Pawn' and 'To Be Queen: A Novel of the Early Life of Eleanor of Aquitaine' by Christy English both deal with Eleanor of Aquitaine. Eleanor was a woman who lived at the time of Robin Hood and was the wife and mother of many kings, including King John ('bad King' according to '1066 and All That') and Richard the Lionheart.
This is what the Amazon product review says about 'The Queen's Pawn':
What the reviewers say:
"An astonishing debut! Christy English spins an unforgettable tale of dangerous splendor..." --C. W. Gortner, author of THE CONFESSIONS OF CATHERINE DE MEDICI
"...Treachery, betrayal, lust-and an unusual and compelling love story, beautifully told." --Karen Harper, author of THE QUEEN'S GOVERNESS
"... one of the best written and captivating historical fiction novels of the year... "To Be Queen" is a historical fiction novel you will not want to miss!" --Pittsburgh Historical Fiction Examiner
What I say:
Eleanor of Aquitaine was an amazing woman. If you love the Tudors and Robin Hood, have a look at some medieval romance and intrigue. Get both of these books and read them!