When you’re a writer, what better topic to write about than writing? It’s what you do. But there are a lot of writers and a lot of books on writing. The following suggested writing-related books (assuming, of course, that you’ve already read 7 Million Words: Writing and Selling Nonfiction) are in my opinion some of the best. I’ll be adding other categories, and other titles, but all of the following titles make for a good starting place for anyone wanting to learn more about the craft.

The Classics
The following two books are the Iliad and the Odyssey of nonfiction writing books:
On Writing Well: The Classic Guide to Writing Nonfiction by William Zinsser.
The Elements of Style by William Strunk, Jr. and E.B. White

Five Highly Recommended Books on Nonfiction Writing
The following other books are excellent resources. For starters, I’ve picked only five titles.
Murder Your Darlings: And other gentle writing advice from Aristotle to Zinsser by Roy
Peter Clark (2020)
Writing Tools: 55 Essential Strategies For Every Writer by Roy Peter Clark (2006)
On Writing: A Memoir of the Craft by Stephen King (2000)
The Mindful Writer by Dinty W. Moore (2016)
Bird by Bird: Some Instructions on Writing and Life by Anne Lamott (1994)

Four Good Books on Writing You’ve Never Heard Of
The books listed below are no longer in print, but you can find them in some libraries or buy them through used book sellers. To see what library they’re in, check worldcat.org. To find used copies, visit bookfinder.com.
The Writer’s Mind: Making Writing Make Sense by Michael Adams (1984)
The Hardest Parts: Techniques for Effective Non-Fiction by Thomas Fensch (1984)
Writing Solutions: Beginnings, Middles & Endings by Thomas Fensch (1989)
The Writer’s Friend by Martin L. Gibson (1989)