Project Gutenberg

Project Gutenberg is an excellent resource, so I am surprised when I hear people say they’ve never heard of it. Created by Michael Hart, the site exists merely to distribute copies of e-texts.
E-book collections like this can be beneficial to students and instructors in two ways. Students can instantly access literary works, even those that may not be held by their library (or are currently on loan to someone else). For instance, I was recently looking for a fictional book called The King in Yellow. The local college library does not appear to have a copy of the book. Neither does the local regional library. I could attempt to do an Interlibrary Loan for the text, but the copy might not arrive for several weeks. But I was able to pull up the e-text for the book in under a minute and start reading away. The search and feature can be helpful to instructors in labs who want to demonstrate something in a text quickly. While lecturing, you can access any of the documents on the site, project them using a Boxlight, and highlight the particular passage you want to emphasize.
The downside is that the Guttenberg Project does not contain multiple editions of the books it collects, so the edition stored on the database may not match the edition your instructor is using. But it is good for accessing printed works quickly, or simply if you want something to read on your computer for pleasure.

Project Gutenberg Website