Here at Caffeine, we love to explore the more esoteric elements of the coffee industry. Drum roll please... this is Jonathan Tam’s guide to Geisha! Photo by Blake Richard Verdoorn.

Chris Bartlett explains how extraction rates affect the characteristics of coffee. Photo by Joshua Ness.

Each issue, Caffeine tackles some of the complexities associated with the coffee industry. Here, we attempt to explain the resurgence of lever espresso machines.