Mike's suggestion is an excellent one. Depending on your reading style though, you may also want to reconsider getting a manual you can hold in your hands, underline and dog ear.
If your digital camera is not a complex one, a pdf file is a good way to go. Best of all, it costs nothing.
The manuals for advanced digicams can be a 150-200 pages or more. Even some basic cameras have manuals more than 100 pages. It might be quite a bit to print out or read on a computer screen.
