The following are a few books that will help you improve your understanding of Jenkins:  Jenkins: The Definitive Guide: Continuous Integration for the Masses by John Ferguson Smart  Learning Continuous Integration with Jenkins: A beginner’s guide to implementing Continuous Integration and Continuous Delivery using Jenkins 2 (2nd Edition) by Nikhil Pathania  Continuous Delivery with Docker and Jenkins: Create secure applications by building complete CI/CD pipelines, 2nd Edition by Rafal Leszko