John Longhi interviewed Robert Crumb at the Last Gasp warehouse in San Francisco. He talks about the time he took a dose of bad LSD that negatively affected his brain for months (maybe for life, he thinks). Even though it was a bad experience, his creativity went into overdrive.
Crumb also recommends the book, The Cotton Kingdom : a traveller's observations on cotton and slavery in the American slave states, by Frederick Law Olmsted. It's available as an ebook at Archive.org.
Mark Frauenfelder is the founder of Boing Boing and the editor-in-chief of MAKE and Cool Tools. Twitter: @frauenfelder. His new book is Maker Dad: Lunch Box Guitars, Antigravity Jars, and 22 Other Incredibly Cool Father-Daughter DIY Projects