From PMI website (www.pmi.org)
Before you take the PMP exam , you need to read carefully the PMP Handbook
How to Use the PMP® Credential Handbook
This handbook contains information on how you can apply for the globally recognized, highly valued PMP credential.
This handbook applies to both computer-based and paper-based testing candidates.
PMI requires that all PMP credential applicants read this entire handbook.
The purpose of this handbook is to provide you with important information about the policies and procedures for obtaining and maintaining the PMP credential.
The features in this handbook allow you to:
Find information on each policy or procedure by clicking on a topic in the left navigation bar.
Find tips and important information by reading NOTES throughout the handbook.
Access the online application system and other information by clicking on links within this handbook.
from PMI website