Reddit mentions of Revising Fiction: A Handbook for Writers

I can give you three books that I recommend without reservation. The first is the easiest to read and a solid introduction to fiction editing. The second goes into more depth, with an excellent workflow for the revising process in the latter chapters. The third is the most dense, like a college class in fiction editing with a focus on how the 19th and 20th century masters actually revised their works, but it is also the most thorough.

Self-editing for Fiction Writers (written by two editors)

Stein on Writing (written by an accomplished editor)

Revising Fiction (written by an college professor, writer and editor)