I think they have to currently be in print, which would disqualify The Butterfly Picnic. (I'll have to hunt down a personal copy of that. The only Aiken I've read is her YA stuff and Jane.)

I'll have to check out Gloriana's Torch too. There's a world of great Tudor fiction. If the language wasn't so stiff, I'd suggest Ruled Britannia; with Bring up the Bodies just out I'm wondering if there's going to be a swell of votes for Wolf Hall.

Or flip to fact - have you read Queen Elizabeth's Spymaster by Hutchinson?