Although I've been a slacker in the Plaidy department lately, others have been reading her. Here's a post from I Heart Books about The Shadow of the Pomegranate, about Katherine of Aragon. It's a UK edition, evidently, with a very pretty cover. (But do pomegranates really cast that large of a shadow?)
And Daphne's been reading Passage to Pontefract, about Richard II and with a delightfully cheesy cover. (Note how much alike "Pomegranate" and "Pontefract" sound.)
Finally, speaking of Richards, here's the cover for the upcoming reissue of The Reluctant Queen, about Anne Neville, Richard III's wife. I rather like this one; although I have it in paperback, I may buy it just for the purty cover.