PubHTML5 allows you to protect your flipbook by adding a password. And anyone with the password can access your publication. You may manage the privacy settings of your flipbook in the following way:
Step1. Login in, click on the “MY PUBS” option on the left bar, and select the flipbook you want.
Step2. Click the “Public” icon.
Step3. Choose the “Private” option and enter the authorization ID.
Step4. Click the “Save” button when you’re done.