At any given time I have somewhere around 50 books "in flight" in the sense that I've read at least a few pages and put it in "currently reading" status on Good

At any given time I have somewhere around 50 books "in flight" in the sense that I've read at least a few pages and put it in "currently reading" status on Goodreads. But there's usually one (or two) that are getting the bulk of my attention. Right now the main book I'm focusing on is Artificial Intelligence: A Modern Approach by Norvig and Russell. I'd had this on my shelf for years and never got serious about working my way through the entire thing until recently. And I have to say, I now really regret not starting this project sooner. There's so much great stuff in this book. I'm not just "reading" it like a novel though. I "just read" up to a certain point (basically the end of the section on inference using FOL) and now I'm going back to a certain point (the beginning of the section on logic based agents) and going back through and doing exercises, implementing the algorithms myself, etc. Once I've satisfied myself that I have done all I need to do with this area, I'll pick back up with the section that starts talking about Uncertainty and repeat the process. And I'll keep picking through a couple of these other 49 books in random moments of idle time here and there. I'll probably finish Behind The Cloud by Marc Benioff soon. Reading frequency? Not sure what you mean. I read everyday with few exceptions, but since books vary in length and density, I can't say "I read two books a week" or anything like that. But FWIW, I log my reading with Goodreads, and over the last 10 years or so of my life, I've averaged finishing somewhere between 35-50 or so books per year.