We found 4 Reddit comments about Craft Coffee: A Manual: Brewing a Better Cup at Home. Here are the top ones, ranked by their Reddit score.
heres the book I was referring to, you would probably like it a lot!
Craft Coffee: A Manual Brewing a Better Cup at home by Jessica Eastro is a must have in my opinion. Is very detailed about everything coffee from growing to brewing. Is also very easy to understand for people just getting into the coffee game as well as good information for people who have been into coffee for years.
How set are they in their device and method, and are they interested in reading/learning about brewing?
Rather than the beans or any particular device, I've been finding this book to be really valuable as a casual/at-home brewer. It's fairly method-neutral, does a good job of explaining how to tune your cup for strength/extraction using evidence, and has a nice mix of "prose" and "information-focused" sections. Plus, the printing quality and material texture of the physical edition is just really nice.
This book is beautiful: https://www.amazon.com/Craft-Coffee-Manual-Brewing-Better/dp/1572842334 Pretty sure it will explain everything you need to know about grind size, water to coffee ratio and brew methods.