The Physics of Espresso – Jonathan Gagné

The Physics of Espresso by Jonathan Gagné sets a new benchmark for espresso science—one that will stand for generations. Seen as the modern successor to Espresso Coffee: The Science of Quality by Illy, it offers far more practical, actionable insights for today’s baristas and coffee professionals.

Clear, concise, and comprehensive, Gagné guides readers through the physics of espresso preparation and extraction. Drawing on scientific literature, original experiments, and contributions from other leading coffee thinkers, he covers every key aspect of espresso making—offering numerous original ideas along the way.

Chapter topics include:

• Water chemistry

• Espresso extraction

• Percolation science

• Grinding

• Puck preparation

• Shot dynamics

• Pressure and flow profiling

• Coffee storage and freshness

For the coffee enthusiast, professional, or self-confessed espresso obsessive, this is essential reading - and one we highly recommend.

About the Author:

Jonathan Gagné is an astrophysical researcher at the Montreal Rio Tinto Alcan Planetarium and an adjunct professor at the Université de Montréal. He is the author of the blog 'Coffee Ad Astra,' where Gagné shares both succinct and in-depth reflections on applying his expertise in physics to the world of coffee brewing.