Politics | O: A Presidential Novel And the Author of O: A Presidential Novel Is... ...Mark Salter! By Evann Gastaldo Posted Jan 27, 2011 9:29 AM CST Copied Mark Salter, left, and Greg Wendt, senior advisers to Republican presidential candidate Sen. John McCain, R-Ariz., talk as they arrive with McCain in Columbus, Ohio, Monday, Sept. 29, 2008. (AP Photo/Gerald Herbert) The anonymous author of O: A Presidential Novel didn’t stay anonymous for long: It’s none other than McCain speechwriter Mark Salter, sources confirm to Time. Page Six had previously guessed Salter could be the author, and there were some hints, writes Mark Halperin: Salter “has been holed up in Maine,” publisher Jonathan Karp had previously worked with Salter (and the descriptions he gave of the author matched Salter), there’s a story in the book that only a McCain campaign insider could have known, and “Salter's non-denial denial was the closest to a confession of any suspect who was publicly asked.” Click for a review of the book. Read These Next More details coming out about the last party the Reiners attended. Here's how Rob Reiner's body was found. First Australia victims lost their lives confronting the shooter. An MIT nuclear science professor was fatally shot at his home. Report an error