When I first received this I was a bit sceptable but after reading it I have to say I loved it.
It's not something I would have chosen to read myself (which I guess is the whole point of the swop!)And I hadn't even heard of the author 
It's a light easy read, and very unputdownable. I really liked the main character - Paul Carpenter although he isn't your typical hero in any sense. Just your average bloke down the pub. But have to say I didn't warm to Sophie, the main female character.
I was sceptable about the 'magic' element of the story but soon accepted it an a tongue in cheek sort of way and in the end was believing in it all. It is sort of a cross between a grown up, comic, Enid Blyton and a light hearted, short, easy version of Lord of the Rings (iuswim).
I was interested to see at the back there was a review for the sequal, so I will now have to hunt it down as I'm now hooked!