If she likes Twilight, then Cassandra Clare's Mortal Instruments series. Better writing, fewer skeevy romance issues (though the poor girl does fall for a guy she's convinced is her brother for a while; happily things go more "I'm going to seriously hurt your jackass lying dad" and less Flowers in the Attic). There's a steamy snogging scene, but less rough-sex-with-your-undead-husband, and 100% fewer first-person demon-baby pregnancies. They even have a blurb by Stephenie Meyer, which is largely due to the authors being friends.

The Holly Black books and Cassie's have a very brief point of crossover.

Also Sarah Rees Brennan's The Demon's Lexicon, although there's more Boy Adventures and less romance.

Also in that group of authors and writing to that demographic, Maureen Johnson, who has a hilarious and crazy presence on Twitter.


I adore the Young Wizards books as well, but I don't know how well they work with that fan group.