There are definitely some great resources out there. If you're into creative nonfiction, I would check out:
Telling True Stories: A Nonfiction Writer's Guide from the Neiman Foundation at Harvard University by Mark Kramer. It's essentially a collection of essays from various nonfiction contributors that contains a lot of great advice that can help you achieve the right mindset as you gather the threads of your narrative.
In Fact: the Best of Nonfiction by Lee Gutkind, and an introduction from Annie Dillard (one of the most well-known creative nonfiction writers out there). It's essentially an anthology that you can use as a reference to inspire your own work. You can also check out Lee Gutkind's other book You Can't Make This Stuff Up for further reading on craft.
Finally, if you want a more broad overview of the nonfiction genre, I would also check out On Writing Well by William Zissner. This one touches on the fundamentals, but I recommend checking this out of your local library since opinions on this work tend to be divided (even if it's been considered a classic for almost forty years now).
If you're hankering for more inspiration in the form of a nonfiction novel, I would definitely check out In Cold Blood by Truman Capote (considered one of the pioneers in creative nonfiction), The Immortal Life of Henrietta Lacks (a nonfiction book that gave heart and spirit to a deeply disturbing scientific oversight) and finally The Liar's Club by Mary Karr (which is a memoir that has one of the strongest narrative voices out there).