I've wrestled with this exact question more times than I'd like to admit, especially when a title like 'Darkness Into Light' pops up in my feed. Legally, unless the author or publisher has explicitly made a free PDF available, downloading it from an unofficial site is piracy. That’s not just a moral point — it can be illegal where you live and it often carries real risks: malware-laden files, dodgy formatting, or incomplete scans that ruin the reading experience.
If you want a clean, legal copy without spending a lot, there are a few routes I take. First, check the author's website or social media — writers sometimes release chapters or full ebooks for promotions. Next, try your public library apps like Libby/OverDrive or Hoopla; I borrow ebooks all the time and rarely pay full price. Also look for legitimate giveaways: publishers sometimes offer temporary free downloads, and sites like BookBub or Kindle Deal pages flag those. If 'Darkness Into Light' is older, check whether it's in the public domain or released under Creative Commons — Project Gutenberg and Internet Archive are worth a glance, but only for public-domain works.
I also avoid torrent sites and random file-hosting links; not only do they hurt creators, they can wreck your device. If money’s tight, ask local bookstores about used copies, consider an ebook rental, or email the author — some are generous and can point you to legal ways to read it. Personally, I’ll hunt for a legal free option first, then borrow or buy; supporting creators matters to me, and it keeps my laptop malware-free.