Sinner's Creed series

Sinner’s Revenge is the second book in Kim Jones’s Sinner’s Creed series about a motorcycle club named… you guessed it, Sinner’s Creed. While I don’t think it’s necessary to read Sinner’s Creed to enjoy Sinner’s Revenge, I did wonder if better insight into Dirk and Shady’s relationship would have allowed me to appreciate Shady’s actions…