let me tell you, it's not easy to find best-sellers legally without paying. But here's the scoop: your local library is a goldmine. Most libraries offer apps like Libby or OverDrive where you can borrow ebooks and audiobooks for free, including popular relationship books like 'The 5 Love Languages' or 'Attached'. Just need a library card, which is usually free to residents. Some libraries even have partnerships with others, expanding your options. Also, check out Project Gutenberg for classics, though they won't have the latest best-sellers. It's all about knowing where to look and being patient with waitlists for popular titles.