Robert Holden, Ph.D.

Please verify your email address by clicking the link sent to .

If you don’t see the email in a few minutes, please check your “spam” folder.

Your current subscription plan does not include videos. Please upgrade your plan to Premier to access videos.

Your current subscription plan only includes book summaries. Please upgrade your plan to Professional or Premier to view this product.

Your current subscription plan does not include audio. Please upgrade your plan to Professional or Premier to listen to summaries.

You don’t have an active subscription. You can compare all of our plans here.