I bought this book for £2.99 from "The Works" last year and for the price I'm pretty impressed. I find books from "The Works" can be a bit hit and miss on quality, but this has plenty of interesting and varied recipes. A good buy for the price I thought.
http://www.theworks.co.uk/p/food/the-bu ... 1445475141
Although I notice online it's £5.99
Good reviews on Amazon too
http://www.amazon.co.uk/The-Burger-Love ... rds=burger