This is a Pride and Prejudice variation/sequel (picking up after Lydia's marriage) with a supernatural twist; while travelling through mainland Europe, young Fitzwilliam Darcy is the accidental recipient of a wound which turns him into a werewolf for two days every month around the full moon. Darcy had always intended to marry a female with the same affliction, but a visit to his friend Bingley's new rented estate in Hertfordshire has resulted in his affections being captured by a certain Miss Elizabeth Bennet. He's been reluctant to propose and we are now six months after Bingley's marriage to Jane. Obviously it would be too difficult to hide something like this from his wife, and he is fearful of rejection, so he invites Elizabeth, under the chaperonage of Misses Anne de Bourgh and Georgiana Darcy, to visit Pemberley where he intends to reveal his secret and see if she'll still accept him.
Personally I don't buy that a gentleman of this time could be an active part of society while harbouring a secret like this, simply because you'd have to miss all social occasions where the moon was full, however I was happy to let this objection slide and go along with it as I thought it was a fun premise.
This Mr Darcy is not quite the same as the original; spending two days a month frolicking about has led to him having far less regard for the conventions of society. He is more outspoken, energetic and excitable, and is pretty funny, he's a character you can certainly get fond of. He also is the alpha of a wolf pack in Derbyshire with all the responsibilities that entails, and we meet the beautiful Nell, a member of Darcy's pack who believes he should be looking somewhere else for his bride...
On the whole, I really enjoyed this book although I was surprised at some events, feeling that sometimes the character's actions didn't seem probable. There are quite a few instances of usage of words that were either too modern or American English but this is a particular bugbear of mine and it may well not bother others as much.
In summary, if you are an Austen purist, stay well clear, but if you'd like to read a fun, humorous, paranormal story based on the characters from Pride and Prejudice then you might enjoy this one too.