For adding Google AdSense to your flipbook, refer to the following tutorial:
Step1. Go to the "Custom Settings" tab and choose the "Simple Mode" option.
Step2. Find the "Google adSense" option by searching it in the "Search" box.
Step3. Enable Google adSense by choosing "Yes" from the dropdown menu.
Step4. Enter your adSense Client ID in the corresponding field.
Step5. Click the "Apply Change" button to save the change.