2 good books if you are interested in old queens (ahem)
\link{http://www.amazon.co.uk/Katherine-Anya-Seton/dp/0340839880/ref=sr_1_1?s=books&ie=UTF8&qid=1305583112&sr=1-1\Katherine by Anya Seton}
\link{http://www.amazon.co.uk/Daughter-Time-Josephine-Tey/dp/009953682X/ref=sr_1_1?s=books&ie=UTF8&qid=1305583209&sr=1-1\Daughter of Time by Josephine Tey}
DoT is actually about Richard III (& the little Princes) but Elizabeth Woodward features in it; Katherine Swynford was the ancestor of Margaret Beaufort who was Henry Tudor's mother (or wife - I get confused!)
Both really well-written & well-researched books, although Katherine has to be quite well-embroidered due to the lack of documentary evidence from that far back.