If you're studying for the PMP exam, you're best to stick with the Exam Content Outline from PMI. That will give you the information and references that will be required knowledge for the exam.
Also, I just heard a podcast from Cornelius on a study plan for the PMP exam. Well worth it. Unfortunately, I don't have a link.
Training for Project Management Professional (PMP)®, PMI Agile Certified Practitioner (PMI-ACP)®, and Certified Associate in Project Management (CAPM)®
