Moonwalking with Einstein: The Art and Science of Remembering Everything is nonfiction. I listened to the audiobook via OverDrive.
Review:
Because the title of this book has apparently confused some people: this is not about Einstein. The title is referring to the memorization technique Foer learned, which involves populating a "memory palace" with bizarre and therefore memorable imagery that one has in some way linked to the less memorable information one wants to memorize.
I listened to the audiobook, so apologies if I have some of the details wrong. If I remember right, this book begins with Foer sitting in on a memory competition for an article he was writing. After the event, he spoke to one of the participants, who told him that, with enough training in the right techniques, anyone could become a memory champion. Foer was initially unconvinced but willing to give it a shot.
This book's overall framework is Foer's own memory journey from "regular guy" to competitor in the finals of the U.S. Memory Championship, but along the way he writes about the history of memorization techniques, the science of memory and learning, the world of memory championship competitors, why supposedly photographic memories don't exist, and more.