answer:Any paperback edition or mass market paperback? George R.R. Martin’s A Feast for Crows was out in Hardcover then (Mass Market and Paperback; come to think of it all his A Song of Ice and Fire books fit that I believe, except maybe the last one which might still be just HC. Dan Simmons’s Drood was out in Hardcover then Mass Market and Paperback. Steven Erikson Dust of Dreams was out in Hardcover then (Mass Market and Paperback) others in that series did the same, including the next one which isn’t out in MMPB yet, but I’m not sure how far back they did HC first. Jonathan Littell The Kindly Ones was out in Hardcover then Paperback (not mass market to my knowledge.)