Zacharias took the offered book, quirking his brows at both the gesture and the use of the word Muggle. He had to briefly wonder what the odds were of running into another wizard in a Muggle bookstore. He supposed, though, it couldn't have been that slim, right? Loads of wizards and witches lived in London, and it was a large city. Still, this was the first time it had happened to Zacharias to his knowledge, and he'd been in London for several years now. He looked down at the book, turning it over to quickly read the synopsis on the back.
"I think a lot of them have a wider imagination," he said, voice a little quieter in case someone were listening in. No sense having strangers ask them what they meant by Muggles, after all. "Probably comes from generally not experiencing the wizarding world. Not that I'm dismissing wizarding authors. They just..." He looked back up at the man. "There's more of a limit at times, as if knowing that magic exists, knowing the rules of it somehow unintentionally limits the possibilities in stories. And not just magic but the general extraordinary possibilities that can happen, even in an ordinary, non-magical life. It's--" He shook his head a little, realising he both didn't entirely know how to explain himself and was at the risk of rambling on to a perfect stranger.
"Sorry," he said, blushing slightly. "And thank you," he added, raising the book up. "I think I might get this book." Not that this man cared, but he still thought it proper to say something.