The Murders of Richard III by Elizabeth Peters
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.