This is perhaps one of the most entertaining and engaging books that I've read in quite a long time. Somerville does an exceptional job of immersing the reader in a whole new alien world, where felines reign supreme.
There were so many facets of this book that really intrigued me and held my interest. At first, I really enjoyed the novelty of Teeman (the human) having to adapt to the lifestyle of a 'pet' to the giant cat, Gregor, and while that role-reversal would have been enough to keep me amused in-and-of itself, as the relationship between 'pet' and 'master' began to develop, it became very clear that this was truly a story of love and understanding. I found the pace in which their relationship continued to grow and strengthen as they began to understand each others language (both verbal and non) and cultures to be believable, and very endearing ('cute' is really the best word that comes to mind). Somerville does a very good job at capturing what I imagine a feline society would really be like, and save for some random alien oddities, immerses you in a world that is very foreign, but strangely familiar at the same time. As a feline biologist, I really commend her for depicting her feline society in an 'accurate' and believable light.
To get down to the nitty-gritty, this is predominantly a story about the relationship that develops between Teeman and Gregor. You could loosely call it a love story, though I'd say it's more about the journey of understanding and companionship, which ultimately results in love. There's not a lot of action (or sex, for that matter) in this book, so if really well-done character development isn't your thing and you're looking for a kinky action packed page-turner, this isn't for you. As far as the sex goes, there are a few scenes in there, but they're very brief and tasteful. Honestly, if I had one complaint, it would be that there wasn't enough of it in there, or that the detail was a little -too- sparse... it seems like the author was teetering on committing to having that content in there or not, and sadly fell somewhere in between, with content that feels somewhat out of place in context to the rest of the story. But that being said, again, the focus of this story really is the characters, and of Teeman coming to learn about a new culture and a new way of life outside his own, and, in doing so, understanding his own culture and species all the more. The ending is a bit of a tear jerker, and though I'm not sure I -personally- like how it ended, I found it to be appropriate, and is definitely one that will last with me for quite awhile. Despite it being a fairly long book, I found it over all too soon, and I'm definitely going to miss Gregor, Teeman, and the rest of the Day-nee!