Acquire an uncopyrighted translation or edition of the book, if necessary. With a little training, you can probably produce a translation or an edition yourself. Alternately, you can hire an experienced freelancer to translate or edit the book for you.
Research various distribution networks. Monetizing online books can be tricky because out-of-copyright books are available throughout the Internet. You can start your own website and offer a service for a flat fee or a per-book fee. Often, PayPal is a standard way for collecting fees from customers.
Collect information on digital book devices, such as the Amazon Kindle. Any opportunities to share customers with the manufacturers of these devices can be a boon.
Set up the web page, if you choose to make your own distribution site. Make payments as easy as possible, as difficulties can discourage attempts at purchasing. Also, arrange the page so that each book has a short summary and recommendations for related books.
Photograph or scan each page of the book. Make sure each word is legible. Shadows or bent pages can make the books harder to read and less attractive to customers.
Add each scanned page to a single document. When downloading, customers do not like to download each document separately.
Upload the scanned document to a website or distribution network. Monitor feedback to your books. If problems arise as to the quality of the book, be proactive in offering partial refunds or dealing with other concerns.