As well as working with an editor on every chapter, I found (using gumtree where lots of clever people looking for work can be found) a complete stranger to read through a late draft and it proved very helpful. I would have repeated the exercise, but a couple of emails I sent out in hope went unanswered; a third one was answered by someone Famous excusing himself as too busy.
Update 20 November It's gone to the typesetter a day early under the title Silence Is So Accurate and I hope it will appear in 2017. I have worked up a cover I like but this can't be finalised until the page-length of the book is confirmed - that determines the spine width.
What I don't have for the cover is something which nowadays is more or less obligatory: I don't have any Puffs from friends, family and famous declaring my book the best thing since the last best thing. Should you be Famous and reading this, a Puff would always be appreciated. Of course, you don't have to read the book ...
Well, now the spine length is settled, here is the front cover. Publication due 15 February 2017, ISBN 9780993587924. Pages 224. Price £20. Available for pre-order at Waterstones and Blackwell and Book Depository.