You might have heard the basics before - caught in a book after being cursed by a god, Julian, Macedonian warrior general, emerges from his literary prison to act as a 'love slave' for his conjuror for one month, before he is forced to return to his imprisonment. Grace Alexander is the disbeliever that actually summons him, and now must keep him for the next month.
After this point, however, Kenyon has added a new element. Grace has been very much hurt in the past, and has a thing about being used as a sex object, or indeed doing the same to anyone else. To Julian's stunned amazement (part of his 'gift' is supposed to be that he is irresistible to women) Grace will not have sex with him. After the first night, they find out that there is a way to break the curse. One that will cost the both of them. Julian his sanity, and Grace her heart. Another compelling element about the book is Kenyon's obviously substantial research into Spartica / Greece history and myths. There are also genuinely comic moments such as Julian's brother Eros and Grace's rather eccentric best friend. These touches lift the book from the ordinary and bring emotional depth to the tale. Julian has been badly damaged by his human past as much as the curse.
How the two make a connection, and the necessarily slow burn of the sexual side of their relationship, combine to lift this book from the ranks of the ordinary and give it that something special.