The Cathedral and the Bazaar

Getting started with Open source development

GitLab Handbook

How to get started with open source

Open Advice: FOSS: What We Wish We Had Known When We Started

The Architecture of Open Source Applications: Vol. 1: Elegance, Evolution, and a Few Fearless Hacks; Vol. 2: Structure, Scale, and a Few More Feerless Hacks

The Open Source Way

Data Journalism Handbook

Free Software – Free Society: Selected Essays of Richard M. Stallman