I've spend stupid amounts of money on books in my life. When I wanted to learn about a topic, I'd go to Amazon and order the top 5 to 10 books in its category. If I saw a book referenced in a few papers on science I read, I'd add it to the cart, and buy it the next time I ordered a stack of 10-20 books.
I figured it was better to have books lying around unread than to miss the opportunity to read on a topic when I was inspired. Books piled up on history, governance, economics, investing, finance, marketing, business, psychology, biographies, time management, habits, willpower, discipline, creativity, writing, selling, publishing, technology, innovation, philosophy, and, umm, lots more. Fiction too, though I didn't read fiction for a while because I thought it was a waste of time. (I was mistaken on that point.)
At least half of those books never got opened up. But it didn't matter. Books were so ridiculously underpriced compared to what they're potentially worth, that I thought it was worth it to have a copies on hand that I could break open to look something up, or check a controversial study's results. I had books on health and nutrition and biochemistry, and man, those were a nightmare contradicting each other.
I was never good at predicting what I'd want to read, so I'd keep a mix of things onhand in case I got inspired, or hit a roadblock and needed to learn more.
There were auxilliary benefits too. I must have bought Michael Gerber's "The E-Myth Revisited" at least a dozen times, because I kept giving a copy away to people who hadn't read it. Everyone who runs a small business should read that book.
It's been a long time since I've shared book recommendations, but I've been reading a lot and have stumbled upon some great books recently. I normally read non-fiction, but I've been integrating some fiction as well. I used to think of it as a less worthy use of time, but I've since read that reading fiction increases empathy (something I'm bad at), and I think/hope that it will improve my own writing. These are all books that I rated five stars.
After reading a few short fun books in a row, I thought that I'd switch to something more difficult and less enjoyable. Sebastian had recommended Musashi to me, and given the book's 900 page length, I figured it would be a tough one to get through. I was wrong-- Musashi was actually one of the most enjoyable books I've ever read. Meal times are the only times during which I'm allowed to visit sites like Reddit, but Musashi was so good that I read it during every solo meal time until I finished it.
Musashi is a historical fiction based around the life of Miyamoto Musashi. Many details, like the names of his opponents and his tactics during duels are historically accurate. Others are period accurate, but didn't necessarily happen. The result is that you get a really fascinating story, learn quite a bit about Japan in the late 16th and early 17th centuries, and you also learn a lot about Musashi's philosophy.