Where can you read your textbook online without buying it?

* Google Books: Google Books allows you to read portions of many textbooks for free. You can search for your textbook by title or author, and then click on the "Preview" button to see the first few chapters.

* OpenStax: OpenStax is a nonprofit organization that provides free textbooks for a variety of subjects, including math, science, and social studies.

* Project Gutenberg: Project Gutenberg is a volunteer effort to digitize and archive public domain books. They offer a variety of textbooks that you can download for free.

* Internet Archive: The Internet Archive is a digital library that offers a variety of free textbooks. You can search for your textbook by title or author, and then click on the "Read Online" button to read it in your browser.

* HathiTrust: HathiTrust is a partnership of libraries that offers a digital repository of books and other materials. They offer a variety of free textbooks that you can read online or download.