NPR has an interview with author Tom Robbins about his new memoir, Tibetan Peach Pie: A True Account of an Imaginative Life. He gives some insight into his experience as a novelist-turned-memoirist, saying that writing a memoir is like driving down a once-familiar road,

…but there are potholes in it now, and some fast-food franchises sprung up along the way, and there’s occasionally a blind curve that you might not remember. But it’s still familiar…Whereas when you’re writing a novel, you’re not only traveling down a road that’s completely unknown, you’re constructing the road as you drive.