False Hearts, by Laura LamRead about another entry on the list.
After reading this indomitable thriller, I think you’ll agree with me in saying there are not enough conjoined-twin narratives in the world today. Admittedly, the sister protagonists at the heart of this novel, Tila and Taema, are formerly conjoined twins. But even a decade after the surgery that separated them, and the subsequent splintering of their lives, their bond remains unique—strong enough, certainly, to endure infiltration by an underground crime syndicate. When free-spirited Tila is accused of murder, reliable Taema is thrust into a world of secrets, danger, and terrifying dream-like drugs as she fights to save her sister’s neck.
--Marshal Zeringue