Seven YA books about twins

At the BN Teen Blog Dahlia Adler tagged seven favorite YA books about twins, including:
Gemini, by Sonya Mukherjee

The key to life for Clara and Hailey’s family has been to stay in their small town forever, surrounding themselves with people who’ve long ceased to be surprised by the presence of conjoined twins. But when talk of the future comes calling and a new guy comes to town, Clara and