I'm a total book nerd and I love chasing down legitimate editions, so here's how I handle 'Inferno' depending on which one you mean. If you mean Dante's 'Inferno' from the 'Divine Comedy', that text is in the public domain and you can legally get it for free: Project Gutenberg, Internet Archive, and many university sites host translations and scanned editions. Librivox even has public-domain audio if you want to listen while walking or doing chores.
If you meant Dan Brown's 'Inferno', that's a modern, copyrighted thriller. I don't download that for free illegally — instead I use my library's digital lending via apps like Libby or Hoopla, or borrow a physical copy. Many libraries let you check out ebooks for a few weeks. Publishers also offer free samples on Kindle or Google Books, and audiobook platforms like Audible often have free trials that can get you the book at no extra cost for one title.
So, quick checklist from me: check Project Gutenberg/Internet Archive for Dante, use Libby/Hoopla/OverDrive for contemporary titles, look for free samples from retailers, and avoid sketchy pirate sites. Supporting translators and authors matters to me, and it keeps the reading world healthy — enjoy whichever 'Inferno' you dive into!