I’ve read about 30 writing handbooks in the last few years. One of the best is The War of Art by Steven Pressfield. It’s not a writing guide as such, more a motivational boot camp nag into how to overcome obstacles in the creative process.
He really knows what he’s talking about, from long and bruising experience:
His website: Books | Steven Pressfield
Pressfield is closely allied with Shawn Coyne, who is his agent and quite a writing guru himself. His Story Grid method of writing a book is worth a look—it’s cheaper as an ebook.
His website: Story Grid
Together they started a publishing company called Black Irish and published a sequel to The War of Art. It’s called Nobody Wants to Read Your Sh*t and is available as a free audio download if you sign up to Audible.