The Physics of Filter Coffee by astrophysicist Jonathan Gagné is perhaps the most important book ever written on the science of coffee brewing. In the book, Jonathan discusses the physics of percolation, extraction, grinding, and water chemistry, and more. He presents some original ideas about coffee brewing and backs them up with facts and data. The book offers recommendations grounded in scientific research, data, and experimentation. Any coffee enthusiast who reads this book will immediately have new tools to make better coffee.