The Company of Rogues books are a splendid series, and this book is no exception. Miles & Felicity are excellent characters and their interactions just sizzle. Wit, danger, sensuality, and much more combine to make this an excellent read. Miles is a warm-hearted, easy-going hero faced with a hellion of a ward whose plans to make things better always seem to make things more difficult. Sparks fly between them in a dozen different ways, each of them delightful.
Other members of the Rogues make appearances (a common thread through all of them, as Miles & Felicity have appeared in other books), tying the novels together nicely. The cats are a key feature; one cat scene had me near tears, shouting "No!" to the author. A nice, subtle bit of Irish paranormal adds to the setting and tone of the book.
The only caveat is that Felicity has essentially grown up with training in society; as a result, being Miles' wife, the future Countess of Kilgoran, will be a difficult feat. The reader is left to assume that Miles and his family and friends will provide her education.
That aside, however, A Dangerous Joy is a joy to read.