Today on /D we focus not on pinhole technique but on our creative craft. The Creative Life in Photography by Lenswork founder Brooks Jensen is good for your soul, and applies as much to lensless photography as it does to any other Art. I highly recommend it: http://fslashd.com/2015/07/book-review-the-creative-life-in-photography/
I read it in small bits trying to digest everything in the book. Much wisdom and almost no gear talk. For the millennials who rarely print he gives some good motivation to find creative ways to share your images. Letting go of the Camera by Brooks Jensen (same author) is also a great read.