[[caption-width-right:220:A book, too, can be a star, a living fire to lighten the darkness, leading out into the expanding universe.]]

Madeleine L'Engle (née Camp, November 29, 1918 September 6, 2007) was an American writer of YoungAdultLiterature best-known for ''Literature/AWrinkleInTime'' and its sequels.

Most of her novels belong to one of two sequences, referred to as "Kairos" and "Chronos", from the two ancient Greek words for time. "Chronos" refers to chronological or sequential time, while "Kairos" signifies a time in between, a moment of indeterminate time in which something special happens. (Although both sequences contain speculative elements, the Chronos sequence is primarily realistic, while the Kairos sequence, which includes ''A Wrinkle in Time'', is clearly sf/fantasy.)

* Time Quartet (concerning the Murry family)
## ''Literature/AWrinkleInTime'' (1962)
## ''Literature/AWindInTheDoor'' (1973)
## ''Literature/ASwiftlyTiltingPlanet'' (1978)
## ''Literature/ManyWaters'' (1986)
* O'Keefe novels (concerning the children of Meg Murry)
## ''The Arm of the Starfish'' (1965)
## ''Dragons in the Waters'' (1976)
## ''A House Like a Lotus'' (1984)
## ''Literature/AnAcceptableTime'' (1989)

* Austin family novels
## ''Meet the Austins'' (1960)
## ''The Moon by Night'' (1963)
## ''The Young Unicorns'' (1968)
## ''A Ring of Endless Light'' (1980)
## ''The Anti-Muffins'' (1980)
## ''The Twenty-four Days Before Christmas'' (1984)
## ''Troubling a Star'' (1994)
## ''A Full House: An Austin Family Christmas'' (1999)

!!Additional tropes:

* AllGirlsWantBadBoys: And no boy is a clearer example than Zachary Grey, who appears in ''The Moon by Night'', ''A Ring of Endless Light'', ''A House Like a Lotus'', and ''Literature/AnAcceptableTime''.
* BuyThemOff: In ''The Young Unicorns'', [[spoiler:they learn at the end that the doctor who had done so much to help Emily after she had been blinded -- had been the person to blind her. (Albeit accidentally.)]]
* CharacterOverlap: The Kairos and Chronos sequences are connected by several supporting characters -- including Canon Tallias and Zachary Gray -- who appear in both, as well as in some of L'Engle's other works.
* DeadpanSnarker: She was once asked in an interview if the 2004 version of ''Wrinkle'' lived up to her expectations.
--> ''Yes. I expected it to be bad, and it was.''
* DreamingTheTruth: In ''The Other Side of the Sun'', Stella (an Englishwoman) goes to live with her husband's father in the DeepSouth shortly after UsefulNotes/TheAmericanCivilWar. After a dream involving fireflies and her husband metamorphizing into a (black) man she had met there, she wakes to the realization that her husband and this man are half-brothers.
* DudeMagnet: In her young adult novels, both Vicky and Polly qualify.
* GladToBeAliveSex: Subverted in ''A Ring of Endless Light''. Vicky and Leo discuss how being close to death has made them more interested in expressing life. Leo uses this as a come-on (including mentioning that his parents had sex as part of their mourning process), but Vicky isn't interested.
-->'''Vicky:''' Why have I been so hungry?\\
'''Leo:''' Because eating is part of life. So is loving.\\
'''Vicky:''' Let's concentrate on eating, then.
* HappyEndingOverride: ''Troubling a Star'' brings back the fictional country of Vespugia from ''Literature/ASwiftlyTiltingPlanet'' and reveals that the events of the latter book only delayed the country's dictatorial government from coming to power by about 10 or 15 years, rather than averting it entirely.
* MamasBabyPapasMaybe: In ''The Love Letters'', Charlotte fled to Portugal because when she told her husband she was pregnant, he had asked her who the father was. (It was him.)
* {{Orgasmatron}}: ''The Young Unicorns'' has a young-adult-friendly version of the trope: a Micro-Ray that can directly stimulate the pleasure center of the brain. The experience is described as feeling like flying.
* TakingTheVeil: In ''A Severed Wasp'', a minor character has this as her backstory -- after her divorce.