Spotted the advertisement for this new book in the latest Model Boats magazine. The book is 'Making Model Steam Boats', author Stephen Bodiley, published by Crowood Press.

Inside there are three articles c/w plans for building model steam boats. A simple steam boat (which appears to be along the Bowman lines), a fast patrol boat and a twin cylinder paddle steamer.

The paddle steamer looks interesting.

https://www.crowood.com/collections/new-releases/products/making-model-steam-boats-by-stephen-bodiley