blogRank "uses over 20 different factors to rank the blogs in any category. Some of the factors include: RSS membership, incoming links, Compete, Alexa, and Technorati ranking, and social sites popularity."
According to the blogRank ranking ReadySteadyBook is the 21st most popular literary blog out there. Indeed, RSB is the only British blog on the list, aside from the London Review of Books website which most certainly is not a blog. It's an odd list -- a book site list rather than a blog list really -- but it is interesting to be well-placed on a chart which is created via such an array of data.