I’ve found a few reliable places where you can legally download novels for free. Project Gutenberg is my go-to—it’s a massive digital library with over 60,000 free eBooks, mostly classics whose copyrights have expired. They have everything from 'Pride and Prejudice' to 'Frankenstein,' and you can download them in multiple formats, including PDF.
Another great option is Open Library, which offers free access to a ton of books, including modern ones, through controlled digital lending. You might have to wait for some titles, but it’s a fantastic resource. For contemporary works, many authors and publishers offer free PDFs of their books on platforms like Smashwords or through their own websites as part of promotions. Just make sure to check the copyright status to stay within legal bounds.