Apple Newton Press (Macintosh) - Manual (Page 31)

Opening your work in progress
You can open a Newton Press document that you have saved as a work in
progress by double-clicking it on the desktop. You can also open it from
within the Newton Press application.
To open a book that you’ve saved as work in progress from within the
application:
1 Close the currently open document, if there is one.
2 Choose Open from the File menu.
The Open dialog box appears.
3 Select the file you want to open and click Open.
31 Creating a Book