by Colleen Hoover: Available for ~$2.99 at Books A Million .
: Specializes in brand-new books at 50–90% off the list price. Their "Frugal Finds" section frequently features titles under $5.
: Check Little Free Library maps for local neighborhood book exchanges or use apps like Libby to borrow ebooks and audiobooks for free from your public library.
: A socially responsible choice that donates a book for every purchase. They often stock library rejects and donated copies at very low prices with free shipping on qualifying orders.