Eidolon is a Seminus Demon, a breed of incubus, who just reeks of dark steamy nights tangled up in silky sheets. He is reaching his final maturation stage and needs to find a mate before he goes into a sexual frenzy where impregnating any fertile female will be his only concern. 
 Being half Justice Demon makes him controlled and honorable, a rarity among demon kind, and dedicated to UGH, which has been his life for the past eighty years. E is one of the founders and a doctor at Underworld General Hospital, along with his two brothers Wraith and Shade, and he has made it his mission to help any creature that comes through his doors but going through s'genesis with out a mate could destroy all that he's worked for. 
 Tayla is an Aegis Guardian, but in the Underworld she is known as a Slayer. When she was sixteen she witnessed a demon raping and killing her mother, after her murdered she learned to fend for herself on the streets on New York until Aegis found her and gave her a home and a purpose - destroying all of demon-kind. 
 When Tayla is ambushed in the sewers she is brought into UGH and because of Eidolon's high moral code, not thrown right back out and killed. He tells himself that it is only to find out more about the Aegis and their possible connection to a rash of creatures coming in brutalized and minus necessary organs that will be sold on the black market but knows that is not the only reason he protects her from his brothers and the rest of the UG staff. Tayla awakes to the darkly handsome doctor and is confounded that demons could have a hospital and not be all about destruction, she realizes the world is not all black and white like she thought. With her instant attraction to E and her new view of the Underworld she walks a thin line between the Aegis, the only family she has left, and her new feelings for the demon E and his work in the UGH. 
 But when E finds an abnormally in Tay's organs he discovers a truth that can turn her whole world upside down. 
 The Demonica series stands apart from others with a new take on the paranormal world of demons. Dark & sexy, every page will leave you craving for more; Ione delivers intriguing characters with side characters that I liked just as much as the main characters, great character development and world building with just enough action to keep you on the edge of your seat. Pleasure Unbound is not just a romance, though that aspect of the story is superb; this is also a story of who-done-it and what-is-it. 
 I like how the main characters decisions just aren't about them; they affect everyone. And I fell in love with all three of the brothers; Eidolon the strong & controlled doctor who's worst fear is going through the s'genesis, Shade the paramedic who has some mysterious curse and Wrath the trouble-maker little brother and treasure hunter with a tortured past. Then Tayla herself is a kick-ass heroine who Ione provides an amusing and sarcastic dialogue for. And there's Gem, a demon working in a human hospital and hopelessly in love with a clueless married human. Your heart breaks for her. I look forward to each of their stories to come in the series. 
 Pleasure Unbound is a well-written novel chuck full of suspense, betrayal & twists and of course hotter then hell romance! 
 In the Underworld and UGH you learn that being a demon doesn't mean you are evil. Larissa Ione's Demonica series is my new obsession!