There are hundreds of books that are closely related to the story of WB&S and Chippenham.
Just one of interest is Thomas Haywood & Sons Ltd., Carol Palmer (2009), ISBN 978-0-9564136-0-4. Available from email@example.com. This tells the story of the signalling company set up by former McKenzie & Holland employee Thomas Haywood.
The many, many books written by O S Nock frequently refer to WB&S, its constituent companies, their work and their business environment. More detail can be found at Amazon’s author page here.