>> guest: robert coles is one of my heroes. he's an eminent child psychologist, psychiatrist, who knows how to listen to children. and, again, he is someone who has mentored me all my life. the first book i did, the first children's book, was called "sweet pea." it was a photo essay about a nine-year-old girl growing up in mt. meigs, alabama. and robert coles was very helpful to me and very supportive and has always been on all my "how it feels" books on everything i've done. i applied for a guggenheim. i didn't get it, but he wrote one of my letters for me. he is someone i admire and respect enormously. c-span: and you mentioned walker percy and here's the photograph. >> guest: walker percy wrote in bed. i flew down to new orleans to photograph him. i liked the photograph because i think he wrote also with a catholic sensibility. so the cross is important to me in that photograph. i returned, oh, 20 years later to rephotograph him and when i was covering the republican convention which was held there not long ago--and i went b