Concise writing. Easy reading. Fascinating concepts. This book uses time travel in ways I've never thought of. It's a page-turner. Many intriguing twists along the way made me want to put on the time belt and go jaunting. Great idea for a novel.All the internal dialogue might have easily slowed the plot. But Gerrold masterfully absorbs his reader in the protagonist's thoughts. In the middle of the book there's a well-crafted and brief POV shift that I found to be brilliant.The story has dark undertones. It contains moments of disturbing, pre-pubescent sensuality. Self-acceptance. Trust. It leads into adulthood and "perfect" love. And loss. It becomes the sadness of old age. Whereas, at first, the story hooks your inner child, by the end it matures Him. It leaves Him satisfied, as though you have truly indulged yourself with a journey through time. This book flows like a river.There are no chapters breaks.Via gamut of life moments, you go from the opening page all the way to the fulfilling denouement. You're following along in the journal the main character, the time traveler. It's impossible to put down. I recommend The Man Who Folded Himself and wouldn't be surprised if you finished it in a day.If you're a parent, it might appeal to your kid(s); you should consider making it available to adolescents. If he "finds" this book at the right time in his life, it could set him off on a lifelong love of science fiction.I don't know what girls will think this novel; it's more of a guy book. I'd like to think I'm wrong about that. In the same way that Harriet the Spy is a "girl movie," The Man Who Folded Himself should be enjoyed by either sex.[If you're female and you loved this book, let me know. I'm curious.]