Understand PMBOK Guide 6th
In order to understand PMBOK and for a better studying approach, you need to understand how it is organized and formulated. According to PMI, “the Project Management Body of Knowledge (PMBOK®) Guide is a recognized standard for the project management professional; a standard is a formal document that describes established norms, methods, processes, and practices”.
Once you have become a PMI member, you can download the electronic copy of the PMBOK Guide (6th edition now) for FREE along with the Agile Practice Guide. It is an encrypted and watermarked version that allows you only to read and print the pages but not to copy and paste the text.
You should exercise caution not to distribute the file to others, as it will be watermarked with your name on every page. PMI takes intellectual properties infringement very seriously.
Through looking into the PMBOK Guide 6th edition, it is recognized that the book's content is organized under three main categories:
A GUIDE TO THE PROJECT MANAGEMENT BODY OF KNOWLEDGE (PMBOK® Guide)
THE STANDARD FOR PROJECT MANAGEMENT
APPENDICES, GLOSSARY, AND INDEX