Well if anybody is that keen to read it, then presumably they could go on to Amazon and order it without any issues whatsoever, whether they live on Merseyside or not, or go to another town's bookshop and buy one, so I don't think any free speech guidelines have been crossed.
Total agreement with most posters here. Let him publish it if he wants (I'm quite surprised he found a publisher, but presumably they felt there was some sort of market for it). The biggest indictment of people's feelings towards him would be not to ban it, but to let the sales speak for...