She published 18 books of photographs; contributed to publications including Life, Rolling Stone, The New Yorker, New York Times, and Vanity Fair;[1] and her photographs have been exhibited worldwide. Mark was transparent with the subjects of her photography about her intent to use what she saw in the world for her art, about which she has said "I just think it's important to be direct and honest with people about why you're photographing them and what you're doing. After all, you are taking some of their soul."[citation needed]