The Darkangel Trilogy is a series of novels by American author Meredith Ann Pierce published between 1982 and 1990. It is set in the distant future, when the Moon has long since been terraformed into a lush paradise complete with its own animals, plants, and races.

Darkangel, the first volume of the trilogy, was published in 1982. The book received favorable critical reception, winning the International Reading Association's annual "Children's Book Award" for first novel, listed on the American Library Association's "Best Books for Young Adults" roster, and was eventually chosen for The New York Times' "Notable Children's Booklist". In 1984, the novel won the Jane Tinkham Broughton Fellowship in Writing for Children from the Bread Loaf Writer's Conference, 1984.

In the first volume, Eoduin, a beautiful young woman, is abducted by a vampyre while out gathering flowers with her slave, Aeriel, and is carried off to be the vampyre's bride. Aeriel, determined to avenge her mistress, returns to the peak from which Eoduin was stolen and waits for the vampyre to return. Eventually, he takes her, but not to be his bride. She is to continue her existence as a slave, but now she has thirteen mistresses, the vampyre's brides, who have all been reduced to wraiths by the stealing of their blood, hearts, and souls. Unable to tell which is Eoduin, Aeriel eventually learns to love them all for her mistress' sake.

Wandering in the garden of Irrylath, the vampyre's keep, Aeriel comes upon a duarough, a tiny man who turns to stone in sunlight, but becomes flesh in shadow. He is a mage, and he gives her a rhyme and sends her on a quest, for if the darkangel (the vampyre) can be destroyed before he takes his fourteenth and last wife, then the power of the White Witch (his 'mother') will be checked for a time. His death will also prevent his becoming a full vampyre and joining with his six 'brothers' in trying to rule the world.

And so, Aeriel flees the castle and begins a quest that takes her wandering far into the desert to find the hoof of a starhorse, the traditional guardian of the realm that the vampyre has usurped. With this talisman, she prepares to defeat the vampyre by using the starhoof to make a brew that would kill him.

Upon her return to the castle, Aeriel is told she will be killed. But Aeriel's execution is stayed so that she can make a wedding sari for his fourteenth, and last, bride. He leaves, only to return empty-handed because none of the brides are more beautiful than Aeriel has become, having been physically changed by her journeys in the desert. The vampyre demands that Aeriel become his bride, much to her dismay. In the wedding ritual, Aeriel gives the vampyre the brew that will kill him.

In the end, Aeriel finds that she cannot kill her darkangel because he is still beautiful, and because there is a trace of good in him. She gives up her life to save him, cutting out her heart to replace his, which the White Witch covered in lead. The duarough, Talb, who witnesses this, takes the former vampyre's (now reverted to his human name of Irrylath) heart, removes the lead, and places it into Aeriel, saving her life and making them one.

The second book in the trilogy was published in 1985 and was a semifinalist for the ALA "Best Books for Young Adults" roster.