If I'm ordering something less than $25 from Amazon, I'll add a book from my to-read list to get free shipping. Usually these are fiction or cheap math/history/

If I'm ordering something less than $25 from Amazon, I'll add a book from my to-read list to get free shipping. Usually these are fiction or cheap math/history/science books. For fiction, these are either books I've already read in digital form and want a physical copy of or new releases from authors I'm already familiar with. Technical books tend to be more expensive, so I usually buy them singly and try to order direct if possible. If I'm doing research on a specific topic I might buy many, but I usually do one at a time. I've found that having too many books in my "to-read" stack gives me a kind of anxiety that stops me from making progress.