This man collaborated with his twin brother on the novels Withered Murder and How Doth the Little  C
This man collaborated with his twin brother on the novels Withered Murder and How Doth the Little  Crocodile? One of his plays is narrated by Old Martin, who sees (*) Pizarro interact with Atahualpa, and this author of The Royal Hunt of the Sun  also described Constanze Weber's adoration for a composer.  For 10 points— name this author of Mozart and Salieri  who created the deranged stablehand Alan Strang in Equus.
This man collaborated with his twin brother on the novels Withered Murder and How Doth the Little  Crocodile?
Peter {Shaffer}