These guides are brilliant. The walks are arranged with the shortest at the beginning of the book and the longest at the end, so if you haven't done much walking you can ease yourself in gently.
Each walk is detailed over about five pages. There is a Ordnance Survey map showing the complete walk, though they are not large and I would therefore advise you to take a 1:25000 map of the area and a compass that you know how to use. There is a general description of the walk with points corresponding to the map and advice on where to park the car or catch a bus.
I would consider the Pathfinder series to be the best available, as the descriptions of the walks compared to my experiences of these walks mean that the authors must have actually done them.