* Online Marketplaces: eBay, Amazon, and Facebook Marketplace often have listings for used textbooks, including GED preparation materials. Search for specific titles or just "GED prep book." Be sure to check the condition and seller ratings before purchasing.
* Used Bookstores: Local used bookstores (both brick-and-mortar and online) may carry GED prep books. Check their websites or visit in person.
* Thrift Stores: Goodwill, Salvation Army, and other thrift stores sometimes have educational materials, though finding a specific GED book might be a matter of luck.
* Libraries: While libraries don't sell books, they might have some GED prep materials you can borrow. Check your local library's catalog.
* Colleges and Universities: Some college and university bookstores might have used textbooks for sale, although this is less likely for GED materials specifically.
Remember to check the publication date of the book to ensure the information is still current and aligns with the current GED test format. The content of the GED test can change over time.