If you do not wish to purchase materials from ATD to study for the exam, you should refer to the CPLP or APTD Certification Handbooks for a more detailed list of exam topics. The most recent handbooks can be found at www.td.org/certification/active-candidates. You may also find suggestions through our candidate preparation LinkedIn groups or locate study partners through your local ATD chapter. See the links below to find those resources:
To locate your nearest ATD chapter: https://www.td.org/chapter-locator
CPLP Candidate Preparation LinkedIn Group: https://www.linkedin.com/groups/8664160/
APTD Candidate Preparation LinkedIn Group: https://www.linkedin.com/groups/8660635/