To see Sources For New Books, open a collection.
You see these sources on the
Collections tab:
These templates were installed with Bloom.
See: Collection tab tasks overview.
These shell books were installed with Bloom.
See: Make a book from a sample shell.
Here you see books that were downloaded. You can make a book from a downloaded book.
Click GET MORE SOURCE BOOKS AT BLOOMLIBRARY.ORG to open https://bloomlibrary.org/.
Now you can get books that other people uploaded.
Open/Create Collections dialog box