Head over to your account’s Dashboard for Sources.
Click on “Add New Source”.
Upload your files (you can have multiple uploads for one source).
Wait for the processing of files to complete (the status indicators will turn green from red).
Click on “Create” once you are done making a new source.
To manage your sources:
From the Sources Dashboard, preview or delete any existing source.
The sources you create can be used across many book projects.
Using pre-uploaded sources can save time and reduce costs associated with generating books.