Mastering Django is the latest version of Mastering Core—the original, best-selling programmer’s reference for Django. Mastering Django is not just a revision of the original book—it has been completely rewritten from the ground up to meet the needs of modern Django programmers. The main goal of this book is to make you a Django expert. By reading this book, you’ll learn the skills needed to develop powerful websites quickly, with code that is clean and easy to maintain. This book is also a programmer’s manual that provides complete coverage of modern Django version 3 and above. For developers creating applications for commercial and business-critical deployments, Mastering Django delivers a comprehensive, up-to-date resource for the latest versions of Django.
Not sure if I have that exact version (mine says "Covers Django 2 & 3" on the cover), but this is by far the most concise and logical book I have ever read.
Not sure how it is possible, but every time there is a Django issue, you can open that book in any random page and it has something useful regarding that issue.