Used book – The Unhoneymooners, Christina Lauren

Cass and Aidan are siblings. Yet, they don't know each other. Until one day, a Facebook message changes everything... Are blood ties stronger than the ones that shaped you?

Before being adopted by a wealthy London family, Cass was a Jones.

But all her memories vanished when, at two years old, she took the name of Montgomery, a prominent line of English politicians. Her life is quite peaceful, Will Hugues aside. Why would the handsome high school heartthrob be interested in her when his court is as large as Prince Harry's?

But Cass's small world collapses the day her father finds himself at the heart of a marital scandal, and her family shatters. That very day is when Aidan, her biological brother, chooses to reappear on Facebook.

Aidan Jones, 18, has moved from foster home to foster home after fleeing an abusive father and an indifferent mother. He survives on odd jobs in the Camden neighborhood and shares a studio with his girlfriend Holly, a slightly older girl, and her son. Cass and Aidan must learn to get to know each other and tame their differences. But are blood ties stronger than the ones that shaped you?