Poor Charlie's Almanack is a celebrated collection of speeches and talks by the legendary investor Charlie Munger, compiled by Peter D. Kaufman and first published in 2005, with an expanded edition in 2008 and a Stripe Press reissue in 2023, shortly before Munger's death. As the long-serving vice-chairman of Berkshire Hathaway, Munger titled the book as a tribute to Benjamin Franklin's Poor Richard's Almanack, and all net proceeds support the Munger Research Center at the Huntington Library. The work is best known for propounding the "Multiple Mental Models" approach to decision-making, detailing concepts like the "Lollapalooza Effect" (the confluence of biases) and the 25 Cognitive Biases that lead to human error. Written in an unconventional, non-linear style with illustrative pictures and geeky humor, it encourages readers to "make the mind reach out to the idea" for better retention. Featuring eleven of Munger's talks, the book has been praised by outlets like Kiplinger's and The Motley Fool as an impressive and thorough tribute to one of the most pragmatic and iconoclastic investment minds ever.