Imagine waking up on a crowded train platform in a foreign country. You don’t know where you are or even WHO you are. That’s what happened to Chicago author David Stuart MacLean. His new book, The Answer to the Riddle is Me: A Memoir of Amnesia, chronicles how he has spent much of the past decade trying to piece together the fragments of what he remembers of his former life. He joins us with his story. Read an excerpt and view a slideshow.