It seems that demons are becoming the new vampires. And that's not bad. They're new, fresh and intriguing. Let's face it, who can resist a sexy demon? And if he's a doctor, like Eidolon, then his sexy meter has gone up in flames. I've read other books about demons, but it's always a nice surprise to see how an author manages to go around the general idea that demons are only bad and have no soul and make them into a lovable character. Eidolon is one of those characters. The older brother, Eidolon is also the most cerebral, or so I perceived him. He's the co-founder of the Underworld General Hospital and one of the doctors. Inside that hospital you'll find all kinds of creatures who you wouldn't exactly expect: vampires, werewolves, incubi, demons, even humans. I think that the idea of putting all these creature who are sometimes enemies is brilliant. Makes me like the series even more. But back to Eidolon.Eidolon loves his brothers so much, he's willing to sacrifice himself in order to keep them from getting hurt or from dying. He's also loyal to the oath he took, to always care for the creatures who come into his hospital. Even an enemy. So when one of his nurses bring a demon slayer into the hospital, Tayla, he treats her like she's just another patient. He didn't exactly liked her job description, but he didn't hurt her and he didn't let others hurt her while she was in his hospital. Tayla is one of those people who sees only black and white. If humans can be good and bad, demons are only bad. The same goes for vampires, werewolves and all the other non-human creatures. I can't exactly blame her for that belief. She saw her mother getting raped and killed by a demon, who she later found out was the worst kind of demon. So when the Aegi, a human organization dedicated to killing all the creatures that go bump in the night, offer her an opportunity to avenge her mother and to protect the other humans to never go through the same situation as her, Tayla accepts it. So when she wakes up in a demon hospital, she's more than just furious. Especially when she realizes she's very attracted to her demon doctor, Eidolon.I loved the universe in this series. It's unique and fresh. Even though he might seem soft, I don't think another character would've been better for a series opener than Eidolon. I still have two books left in this series, but I hope in the near future we'll get another book in this series. I'm not really ready to let go of this universe.