Supergirl By Peter David

Edition excerpt from Supergirl Vol. 1 (1998): Created from protomatter in another dimension by a heroic Lex Luthor, the soulless being called Matrix crossed over realities and became the shape-shifting Supergirl. But when the female heroine came upon a dying young woman, Matrix saved her life by merging their essences. Gaining the memories and soul of Linda Danvers, Supergirl learned more about Linda's seedy past and discovered that she has a lot to atone for. Now as the Woman of Steel attempts to balance her new dual life, she finds herself a major player in the centuries-old battle of good versus evil.