Ian writes in a way that is instantly familiar, within a few pages you'll feel like he's an old friend, and empathise with him through the stories he tells, both happy and sad. This is a book anyone can enjoy, I've bought 3 copies of it as presents so far, one for a Blues obsessed relative, one for my Mum who'll enjoy the stories of Yorkshire life and one for a friend who I just get the feeling will love the writing.
It's rare for a book to appeal on so many levels, music is why the book exists in the first place, but even if you don't like blues, or music in general, you'll find much enjoyment in the other aspects of the book, Yorkshire life, or indeed life in general, friendships, relationships, joy and loss are all dealt with in Ians inimitable style.
I could go on, but suffice to say, buy the book, enjoy it and tell your friends about it.