The Lake of Darkness is a novel by British writer Ruth Rendell

Ruth Rendell

Ruth Barbara Rendell, Baroness Rendell of Babergh, CBE, , who also writes under the pseudonym Barbara Vine, is an English crime writer, author of psychological thrillers and murder mysteries....

, first published in 1980. It won the Arts Council National Book Award for Genre Fiction in 1981.

The title comes from a quotation from Shakespeare's King Lear

King Lear

King Lear is a tragedy by William Shakespeare. The title character descends into madness after foolishly disposing of his estate between two of his three daughters based on their flattery, bringing tragic consequences for all. The play is based on the legend of Leir of Britain, a mythological...

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"Frateretto calls me; and tells me Nero is an angler in the lake of darkness. Pray, innocent, and beware the foul fiend".

Plot summary

Martin Urban is a young accountant leading the comfortable though somewhat dull life of a bachelor. Unexpectedly he wins a very large sum of money in a football pool (104,754 pounds 46 pence), but he decides to give half the money away to the poor. Then Francesca enters into his life, a mysterious young woman who captures his heart. And when he meets Finn, the twisted son of his mother's cleaning lady, the good intentions of Martin become fatally entangled with the macabre madness of Finn, with deadly results.