Love and Madness is a 1780 English novel by Sir Herbert Croft. It was based on the 1779 murder of Martha Ray, the mistress of Lord Sandwich, by James Hackman. Its full title is Love and Madness, a Story too True: in a Series of Letters between Parties Whose Names Would Perhaps be Mentioned Were They Less Known or Lamented. The work proved very successful with many people initially believing that the fictional letters between the participants it contained were genuine.