British Locomotives Of The 20th Century - Volume I 1900 - 1930.
This book is written by O S Nock and was published by Book Club Associates (BCA). It is a second hand edition which is in a Reasonable Condition. However, the dust cover is slightly worn.
An image of the book is shown for your information, if you click on the image a scanned copy of the back cover, contents page or introduction will be displayed.