This is the first year I can really see changes in my personal book-buying habits. Like many others, I’ve found that I’m buying books more often again. This has a lot to do with the convenience and direct nature of buying ebooks. (Feeling down at midnight no longer requires scavenging closets for books.) But I’m also buying print more and often based on its object-value; I like a well-made book, with diagrams and illustrations, and not too many photos. But why the change?