Do The Work (2011) by Steven Pressfield tries to explain how to get out there and write a book or manuscript. The title is great, the book itself isn’t.
Pressfield concentrates on what he describes as resistance, which is the way chattering voices in our head and other distractions stop us from putting the effort in to write a book. There’s something in it. But even in this short, short book it gets repetitive.
There are much better books on writing out there, like Steven King’s ‘On Writing’ and others. Perhaps this might help someone stuck 3/4 of the way through a novel. But for most other people it’s going to seem trite.