I thought I would mention the pair of books I have written and published. I must add that this is not really trade as its minimal profit and not found in shops.
The books follow my experiences in building a 3" traction engine form a 'first-timers' point of view. They are both over 80 pages, full of pictures etc, b/w content with colour covers. Part one also includes four colour postcards of finished engines.
They are getting great feedback from buyers. Part one was reviewed recently in Old Glory magazine and part two will be in the next issue I believe.