The books (I've read the first two, and strongly agree with those recommendations.):
- The War Of Art by Steven Pressfield
- Talent Is Overrated by Geoff Colvin
- The Hero With A 1000 Faces by Joseph Campbell
- Make Every Word Count by Gary Provost
- Effortless Mastery by Kenny Werner
I also have a few other writing-related books HERE, for those interested.