Gay Romance: The Shadow's Roar. Gay Romance, #5

Eight years ago, Garrett rescued a boy as ethereal as an elf from the hands of the serial killer organization Hunter, and established an extraordinary relationship with him. Yet when Garrett learned the cause of Alex's stepfather's death, he began to suspect that what he had saved might be the true devil himself. Eight years later, Garrett retired from the military and became an ordinary FBI agent, his partner now a grown man named Alex, an alluring and enigmatic young man.
This man with an angel's face and an unpredictable heart captivates Garrett in countless ways, drawing him deeper into an inescapable spell with each passing moment.