I usually have one writing book in my reading rotation. They vary based on what I need & the state of my writing. My reaction to Pressfield's The War of Art is always the most telling.
As a freelance writer pre-grad school, it resonated deeply. I needed that "get over yourself & get to work" message.
But during other periods, I'm really turned off by it. That usually means I need to slow down, think through tough ideas, and/or seek out guidance.
Currently I'm re-reading Howard Becker's Writing for Social Scientists.
The "Terrorized by the Literature" chapter is a little too spot on. And the Risk chapter (Pamela Richards) hits a lot harder than it did my first year of grad school.