Alternatively, you can tap Contacts to add your Google account without email.

If you’re just adding a Google account to use Google Play apps, you don’t need to sync anything here. [1] X Research source

If you’re just adding a Google account to use Google Play apps, you don’t need to sync anything here. [1] X Research source

Once you’re done, that payment method will be used any time you make a purchase via a Google Play app, like Google Play Books. [2] X Research source

You can tap the search tab at the bottom of your screen to search for these apps instead of browsing for them.

You can tap the search tab at the bottom of your screen to search for these apps instead of browsing for them.

Since you’ve already added a Google account to your iPhone, you shouldn’t need to log in again, but if you do, make sure it’s the same account that purchased the content (from Movies & TV or Books).