Just use one of the many free, or very cheap alternatives! We have stayed at many so called BritStop places, never once paid them a penny. The venues seem to prefer non members, I guess due to BritStops telling their customers that they don't have to purchase or pay anything. I have never understood the reason for having a book, when an app will find places around you. It is very overpriced. But when it had a book, it was out of date when printed. There is the resource on here, Search for Sites and many others that will give you the information you need.