Washington Post - Vlog brother, Crash Course creator, and bestselling author of Lifetime stories for young adults John Green is experimenting with tiny versions of his titles. There have been a lot of experiments in publishing to reassert the book as a physical object, to ensure it isn't just something you can replicate on a phone or tablet screen. Like music, it might just be that the physical objects are for collectors and superfans. These limited editions are perfect for that.