Another big Capital Returns fan. But there are so many great investment books, especially for the Buffett-Munger-type quality investing fan (great businesses at good prices). I can't choose 3, maybe like 10.
I'm just reading Fabric of Success by James Emanuel. Would recommend it to any investor, because it gives many examples of what quality management is about.
Another impressive book recently: What I learned about investing from Darwin, by Pulak Prasad.
A huge favorite of mine: The Joys of Compounding, by Gautam Baid. I will probably re-read that book every year. The Education of a Value Investor by Guy Spier is not a bad read either. Neither is Richer Wiser Happier by William Green, who was the ghost author for Spier. Or Terry Smith's Investing for Growth, or Taleb's Incerto book series (the understatement of the century).
Margin of Safety by Seth Klarman is a classic.
Poor Charlie's Almanack is a must, especially since it's available for free online: https://www.stripe.press/poor-charlies-almanack/pca/cover . So are The Essays Of Warren Buffett (a must, not free), by Lawrence Cunningham.
Anything by Mauboussin is usually worth reading. Or by Dalio, especially the Principles.
Anything by Pat Dorsey, formerly of Morningstar, such as The Five Rules for Successful Stock Investing.
Mihaljevic, Manual of Ideas.
100 baggers by Christopher Mayer.
Valuation by McKinsey and Co (if one doesn't enjoy it, one shouldn't invest in individual stocks).
Why Stocks Go Up and Down, Pitch The Perfect Investment, Big Money Thinks Small, The Smart Money Method, The Battle for Investment Survival are just a few other favorites in my library.
Even the latest Security Analysis can be a good read, because of the included essays by great value investing luminaries.
Many of these are available online for free on hoopla, for many American library card owners.
There are some absolutely great podcasts with free transcripts at https://www.theinvestorspodcast.com/ (especially the TIP and RWH series, can donate $3/month for ad-free Apple Podcast version), https://www.joincolossus.com/ (needs a free user account to read the transcripts), and https://www.acquired.fm/, to mention some of the best.
There are many great value investor letters, beside Nick Sleep.
I'll stop here. So many smart people, so little time... I bet even Charlie still had stuff to read at 99.