Best book on the theme of "writing" that you read in 2016?

[Quantum]

What's the best book (fiction or non-fiction) on our theme of "writing" that you read in 2016? Why? It doesn't need to have been published in 2016.

My best is:

Self-Editing for Fiction Writers: How to Edit Yourself Into Print
Really practical advice that I can apply to my writing, write away!