Their post has a link to a self-published book about Game of Life looks really interesting. Any other recommendations? The only other cellular automata book I've seen is Wolfram's "New Kind Of Science", which I really dislike. Wolfram is so arrogant and long winded.
Cellular automata are not a common topic. The new book is definitely the best in terms of Game of Life in particular. Another recommendation might be Jarkko Kari's lecture notes, which cover the subject from a more academic perspective. Not coincidentally, he was the advisor of the two discoverers here.
These lecture notes look GREAT, thank you! I suppose that they are not a common topic due to their limited (or non-existent?) applicability. But, they are so fun.
Toffoli[0] & Margolus’[1] Cellular Automata Machines (1987) is the CA bible, I guess. Andrew Adamatsky edited the encyclopedic Cellular Automata (2018). Ed Fredkin's[2] stuff on reversible CA is fascinating. Gerard Vichniac[3] wrote some great papers in the 80s, e.g. Simulating Physics with Cellular Automata (1984). Kenichi Morita[4] papers. Rudy Rucker[5] has written a lot of stuff on 1 and 2D CA, and worked as a CA programmer. Etc. There are a lot of papers. The very common finite element method of solving differential equations and PDEs is basically the same thing as CA - see e.g. Anderson's Computational Fluid Dynamics.
Attractors and approximations for lattice dynamical systems by Shengfan Zhou, 2002.