1. High-level programming, probably functional-related.
2. Business/startup
3. Some quality-of-life stuff.
Instead of institutionalizing the topics, we can just start with one good one, and then use suggestions/voting to make up a queue.
My bigger concern is timing. We're all pretty busy.
I say we mix it up. Something that is readable by and interesting to nearly all of us, but unread by most of us. The former requirement means technical books (even something like SICP) are unfortunately unwise choices, partially due to their nature and partially due to the longer reading times. I will wait for some more upvotes (interest) and comments before expressing my own suggestions.
The only thing i would ask is that when people pick it, remember that book clubs are generally meant to inspire discussion. It's kinda hard to discuss some technical books that take awhile to digest.