Finding free PDFs of highly-reviewed romance novels is a bit like navigating a minefield—you've got legal, quality, and discovery issues all at once. I've spent way too much time on this, and the cleanest path is focusing on authors who offer permanent freebies as loss leaders. Courtney Milan's 'The Governess Affair' is a staple recommendation because it's genuinely good historical romance that builds into a series, and she offers it directly on her website. Similarly, Tessa Dare has put 'The Duchess Deal' up for free during promotions, and grabbing it legally then means you get a proper file. The reviews for these aren't just high—they're from people who then bought the rest of the books, which tells you something about quality.
But the 'top reviews' part is tricky outside the mainstream. Sometimes a little-known indie title on Amazon will have fifty-five-star reviews because the author's ARC team is diligent, not because it's actually exceptional. I cross-reference with Goodreads ratings and look for volume of reviews, not just average. A book with 4.2 stars from 10,000 reviews is more reliable than 4.8 from 200. For contemporary, I'd trust the reviews on something like Kennedy Ryan's 'The Kingmaker' (often free) because the discourse around it is substantial and critical, not just fawning.
Honestly, the PDF hunt itself often leads to sketchy aggregator sites that slap five-star labels on anything. I've had better luck using the 'Freebie' tags on legit review blogs like Smart Bitches, Trashy Books, where the reviewer's taste is already known. They'll say things like 'this free novella has the emotional punch of a full novel' and link to the author's newsletter sign-up. That's how I found Talia Hibbert's 'A Girl Like Her,' which was free for ages and has reviews that accurately reflect its thoughtful take on the genre.