Picked this up at the Book Thing, for BC.

This is my 43rd book registered for the BC Race to 3 Million.

From the cover -
When attractive American Jacqueline Kirby is invited to an English country mansion for a weekend costume affair, she expects only one mystery. Since the hosts and guests are all fanatic devotees of King Richard III, they hope to clear his name of the 500-year-old accusation that he killed the little princes in the Tower of London.
Jacqueline is amused at the group's eccentricities until history begins to repeat itself. A dangerous practical joker recreates famous fifteenth-century murder methods - beheading, poisoning, smothering, and even drowning in a butt of malmsey. As the jokes become more and more macabre, one at last proves fatal.
Jacqueline puts all her observations together for a dazzling solution that will surprise even the most attentive reader.

Sadly, MaryZee passed suddenly in September 2012. MaryZee's daughter is now ready to rehome her mom's books and I was willing to collect and redistribute them to keep her literary legacy alive.

MaryZee was a enthusiastic evangelist for BookCrossing and I am glad I had the opportunity to know her. She is very much missed, and I'm proud to be able to receive some of her books to share with the world.

Left on one of the tables outside the shop.

======================

DEAR FINDER,
Welcome to BookCrossing.com, where we are trying to making the whole world a library!

If you have not already done so, please make a journal entry so we know this book has found a new home. You don't need to join BookCrossing and you can remain completely anonymous. However, we encourage you to join so that you can follow this book's future travels. It's fun and free, and your personal information will never be shared or sold. If you decide to join, consider listing   ResQgeek (or any of the other journalers) as referring you.

Take your time reading the book, and after you finish, please make another journal entry to record your thoughts about it. This book is now yours, and you can keep it if you choose, though we would love for you to share it. If you pass it along, please make a release note to let others know where you left it.

I hope you enjoy the book!