 Gertrude and Claudius

Gertrude and Claudius is a novel by John Updike.It uses the known sources of William Shakespeare's "Hamlet" to tell a story that draws on a rather straightforward revenge tale in the medieval Denmark depicted by Saxo Grammaticus in his twelfth-century "Historiae Danicae", but incorporates extra plot elements added by François de Belleforest in his "Histoires tragiques", published in 1576.