If you like your documents to be read continuously but you missed creating a folder, it's easy to create one.
Go to your Library.
Tap the Folder 📂 icon.
Name your folder.
Tap on the green ➕ icon for each document you'd like to add. It will change to a blue check ✔️ icon once tapped.
Tap on the blue Create button.
Once the folder is created and documents have been added to it, you can now start reading. Just tap on the Play ➡️ button and it will read all of your documents from one document after another.