When is a pass not a pass? The author reckons the essential requirement of a mountain pass is that it must permit access from either side, allowing a crossing from one valley to the next. In this book, Wainwright describes 48 such passes in the Lake District, seven of which are traversed by roads and the rest for walkers. It is the fourth book he has done in collaboration with Derry Brabbs whose photographs and maps accompany the text.