Fallen Series by Lauren Kate. "Before Earth was created, Daniel Grigori and Lucinda Price, two angels fell in love. Lucinda once loved Lucifer but realized that he's using her and left him. She was broken when she met Daniel Grigori"
Teardrop (Teardrop, Since Eureka's mother drowned, she wishes she were dead too, but after discovering that an ancient book is more than a story Eureka begins to believe that Ander is right about her being involved in strange things--and in grave danger.