The Ribble Way is a well marked path as it is. However this book is useful because in certain places the detailed directions do provide that extra assurance as a guide. A common occurrence in particular is knowing which direction to cross fields or moors.
I feel the 3 star review elsewhere was rather critical but I can see how the small size of the text can be an issue. Though the book is a neat pocket size as it should be. I found it easy to follow and the historical and geographical aspects of the walk described between the text on directions provides an appreciable context to the walk. Personally I have limited interest in the local history but I think most walkers would want to know something and put some definition of the areas passed through.
The book provides succinct info related to planning the walk (divided into 7 sections). I suspect the book could do with revising at some point hopefully by the time of the new bridge over the River Douglas gets built which would add a further section to the walk.