MontanaLibrary2Go: Provides access to digital content, such as Audiobooks and eBooks for patrons of participating libraries throughout Montana.
WorldCat: Libraries Worldwide (MSUB Access): Over 1 billion items in more than 80,000 libraries worldwide.
Billings Public Library: Visit the Billings Public Library online catalog.
Ebook Central is your resource for ebooks providing breadth and depth of authoritative content. Also available through the Library's catalog.
Springer eBooks - Over 55,000 books available online. Springer’s eBook Collection uses the portability, searchability, and unparalleled ease of access of PDF and HTML data formats to make access for researchers as convenient as possible.
HathiTrust Digital Library - A partnership of academic & research institutions, offering a collections of millions of titles digitized from libraries around the world.
Online Books Page - over 40,000 free books (in the public domain) on the Web