text: You haven't said which certification you're interested in, but I'm assuming it's PMI's PMP certification.\n\nI use Rita Mulcahy's book in the PMP prep class that I teach, and it is basically a self-study guide. I've put a link below.\n\nThere are many free resources available on the web, but you need to make sure that anything you use is based on the 2004 version of the Project Management Body of Knowledge, and not the older 2000 version.