I had expected this book to tell me lots about the dockyard railway systems. Instead, what I got was a bland and superficial overview of the locations along with a few old Ordnance Survey plans.
The main part of the book (probably 85%) is a list of the locomotives that worked on these railways with a few pertinent details (cylinder size, makers details etc). Many of these have pictures, but a fair number of the pictures weren't taken in the dockyard locations making them of dubious overall relevance to the title of the book.
Of the actual dockyard railways and operation there is virtually nothing, certainly nothing that couldn't be found or seen elsewhere in other books similar books, and some of these other books are considerably better. The complex systems that operated on these railways and the fascinating and varied loads that came in and out of the dockyards are regrettably completely ignored leaving huge gaps in the coverage.
In summary, if you want to know about London's dockyard railways, look elsewhere. If you are interested in industrial locomotives (especially the ones that worked on the dockyards) then this book will be of interest. The title of this book is almost a breach of the trades descriptions act and a better title would have been "Locomotives London's Dock Railways".
Regrettably this seems to be Mr Marden's style as it is broadly similar to other similar books on similar locations. I'm sure that most people were interested in the locomotives but equally I'm sure that there must be many more interesting dock railway locations on this system that are not covered in this book.
An opportunity lost. Two stars only because I liked the locomotives. Otherwise one star only.