Sons of Anarchy: Bratva by Christopher Golden
Set in the world of The Sons of Anarchy during season four from the mind of Executive Producer Kurt Sutter, Jax learns that his half-sister, Trinity, has been in the U.S. for months without his knowing - and has abruptly gone missing - he heads to Nevada with Chibs and Opie to search for her...only to find that Trinity has gotten herself caught in the middle of a war between rival factions of the Russian mafia, and dragged Jax and the Sons in after her...