I LOVE Seth! It was so great having all Seth and no Aiden in my way! About time Seth was the star. When I first heard of this book I thought it might take place while Seth was serving Hades but it takes place about a year after the events that took place during Sentinel. Seth is serving Apollo and Apollo has a mission for Seth. Protect the girl. 
 Seth still feels bad about what happened with Alex and he doesn't think he deserves love and forgiveness. He doesn't want history repeating itself and this girl reminds him of Alex. He realizes he is very protective if her. There is both Seth and Josie's perspectives which I like because it makes the story so much more clear and we know both their true feelings. 
 I loved that Deacon and Luke were back. They are such characters. Hilarious and sweet. Sentinel Solos and Alex's Uncle Marcos also make appearances. History is repeating itself but finally Seth gets the girl!!! We are in new adult territory so we finally get some sexy sexy Sethie scenes! Lots of new battles to face. Can't wait for the next. Things just got started. That was my only reason for not a full five stars. I felt like things moved a bit slow. It was a good set up but just not quite as exciting as I was expecting. 
 "What are you?" she asked, her nose scrunching as she spoke. "Other than a heart-stopping hot guy with obvious boundary issues and problems with anger management?" 
 I blinked at her. She thought I was a heart-stopping hot guy? Well, of course she did. 
 "Say that I'm not just the Apollyon," he whispered, his voice harsh. 
 Tears built in my throat. "You're not just the Apollyon, Seth." 
 His eyes drifted shut, his face tensed as his fingers splayed across my cheeks. "I don't even know who I am anymore. Or what I ever was." 
 Oh goodness, that ripped right through my chest. "You're just...you're just Seth." 
 A tremor moved through his arms. "And you...you're just my salvation." 
 *I borrowed an ARC and this does not affect my review*