Darkangel Trilogy Series by Meredith Ann Pierce

Aeriel is kidnapped by the darkangel, a black-winged vampyre of astounding beauty and youth. In his castle keep, she serves his 13 wives, wraiths whose souls he stole. She must kill him before his next marriage and comes into full power, but is captivated by his magnificent beauty and inner spark of goodness. Will she choose to save humanity or his soul?

Aeriel's love has broken the curse on the darkangel Irrylath, making him human again and freeing him from the control of his mother, the dreaded White Witch. But the Witch is far from defeated. Her wicked plans require all seven of her vampyre sons, and she will not give one up so easily. There is but a single hope for the Witch's defeat--solving an ancient, mysterious riddle. So Aeriel sets off to solve the riddle, sailing across a sea of dust and straight into the worst of the Witch's terrors... moreAeriel's love has broken the curse on the darkangel Irrylath, making him human again and freeing him from the control of his mother, the dreaded White Witch. But the Witch is far from defeated. Her wicked plans require all seven of her vampyre sons, and she will not give one up so easily. There is but a single hope for the Witch's defeat--solving an ancient, mysterious riddle. So Aeriel sets off to solve the riddle, sailing across a sea of dust and straight into the worst of the Witch's terrors. But if Aeriel is to save Irrylath and her world, she will have to overcome his bloodthirsty darkangel brothers--and ultimately confront his terrifying mother face-to-face. less

All the world’s wisdom and magic resides within the iridescent depths of a small white pearl. “All my sorcery,” the Ancient Ravenna had said of the pearl. “It is left to you to save the world.” But is the pearl powerful enough to enable Aeriel to defeat the White Witch? Aeriel’s people have assembled an army--led by the redeemed darkangel Irrylath--and are soon to attack the Witch and her darkangel sons. But their cause is hopeless unless Aeriel can unlock the mysteries of the pearl . . moreAll the world’s wisdom and magic resides within the iridescent depths of a small white pearl. “All my sorcery,” the Ancient Ravenna had said of the pearl. “It is left to you to save the world.” But is the pearl powerful enough to enable Aeriel to defeat the White Witch? Aeriel’s people have assembled an army--led by the redeemed darkangel Irrylath--and are soon to attack the Witch and her darkangel sons. But their cause is hopeless unless Aeriel can unlock the mysteries of the pearl . . . and of her own destiny. less