Q: How do I read ebooks from the Internet Archive?

Internet Archive (IA) is a nonprofit organization started in 1996 with a mission to “provide Universal Access to All Knowledge”. The creators of the Wayback Machine, it began archiving web pages but later on has created a digital library of not only Internet sites but also of other cultural artifacts including images, sounds and texts. They have over 24 million texts and books that are free to download (in public domain), while another 1.5 million are “free-to-lend”. 

Downloading a whole ebook without restrictions depends on whether the book is in public domain or not:

• If it is not in public domain, the book may only be "borrowed" for 14 days or for 1 hour, depending on the number of physical copies the IA has.
  • If there is only one copy, the ebook can only be borrowed for an hour while titles that has two or more physical copies enables 14-day loans.
    • For 1-hour loans, the whole book can be perused just inside your internet browser. You can always borrow the item after one hour if you are still not finished reading the ebook.
    • For 14-day loans, you will be able to download a file to be opened in Adobe Digital Editions or mobile ebook reader apps. An Adobe.com account is required if you want to access the book across your mobile devices. (Note: if you are a registered user of Adobe products like Photoshop, Premiere Pro or Dreamweaver, you might already have an Adobe ID and can use it as your account in authorizing ebook apps for accessing borrowed ebooks)
• Titles in the public domain can be viewed in full using just the web browser. They can also be downloaded in many formats like PDF, ePUB, Mobi, etc. A downloaded ebook in the public domain can be viewed without limits with its file format's associated ebook reader.

A free personal Internet Archive account is needed to borrow ebooks in archive.org. This is separate from your Infonet account. 

For more details, Internet Archive has provided detailed instructions and support in their help page.