To create a text page to your Classic book, go to the Draft where you want to add a text page to. Tap the + sign in the bottom right-hand corner:
Then, tap "Text page."
Add the text you want on the text page. Once you've added the text you want, tap "Done."
You will now see your Text Page in your Draft. If you'd like to move the text page, tap the text page and hold it down. Your screen will now look like this:
You can drag your text page to where you'd like it to go within the photo book. Once it's where you'd like it to be, tap "Done Rearranging."
If you'd like to edit your text page, go back to the text page, and tap "Caption."
Edit your caption and then click "Done."