This book would appeal to people who live or have lived in Sheffield, and particularly those who climb. Sheffield climbers is a pretty niche audience.
I picked this book up because Sheffield is a city I know well, I used to occasionally climb. I found the book really frustrating. Mort makes the assumption that the reader is familiar with climbing and climbing terms, grades, etc. While also expecting them to know the topography of Sheffield and parts of the Peak District.
For example, there is a casual reference to sitting outside The Lescar. The Lescar could be anything, a monument, a club, a building. It's actually a pub.
For the record (this is a v rough outline), routes up rocks that are climbed are graded in difficulty; moderate, hard, difficult, v diff, hard very diff, severe, v severe etc etc. Each is route is given a name and a grade by the first person who climbs the route. Moving up to Extremely Severe which is categorised via E1, E2, E3 and on. These are considered the more difficult end of climbing. There is only one E10 route in the UK (I think) and fewer E9 routes which have been climbed by a handful of the most talented rock climbers. E7 grade, which is the grade of Black Car Burning the climbing route at the centre of the book is therefore considered to be a very hard route not accessible to many climbers. I hope that is helpful, should you decide to read this book.
Mort is a poet and this is clear in some of the descriptive writing which gives personality to the topography mentioned in the book, but with little clear idea of what and where these places are. Some are areas of the city of Sheffield and some are old quarries, rock formations and a reservoir in the Peak District.
Plot spoiler: as the story unfolds it becomes clear that there is an unrealised connection between
2 of the characters in the book, whose stories exist in parallel while a third character steps between them, apparently unknowing. The plot is driven forward by the expectation of when this connection will become clear and how. However, once again Mort fails to reveal details to the reader. The connection simply happens and as a reader, I was left wondering how/why/when Leigh worked it out. Disappointing.