The Bonds of Blood (The Final Formula Series, Book 4.5)

Born without a heartbeat or a soul, James Huntsman has never felt part of the mortal world. It's an insecurity his abusive brothers reinforced daily, and with his very existence bound to theirs through the alchemically altered blood they share, James has always been at their mercy.All that changed when James found a home within the magical community and fell in love. Elysia Mallory doesn't mind that he is technically dead. The only thing standing between them is her lethal magic. As her health continues to deteriorate, James searches for a cure, determined to save her and give them a chance at a life together.But his brothers aren't willing to let him go, not when the Huntsman legacy is dependent on James. They will stop at nothing to capture their wayward brother, and that includes using Elysia as leverage. James is left to decide how far he is willing to go to save the family he has chosen from the family he was created to serve.(The Bonds of Blood is a 62,000 word novel.)