There’s a whole scene for this if you know where to look, and it’s honestly way better now than it was a few years back. I’m not talking about pirated snippets on sketchy forums—mainstream retailers like Amazon, Apple Books, and Kobo almost always have ‘Look Inside’ for ebooks, which usually includes the first few chapters. For this specific genre, that’s where you get a real taste of the prose style and heat level before committing. Some authors and publishers are smart about it; they’ll make sure the preview includes a charged scene or some banter that’s representative, not just the tame setup.
Beyond that, a lot of indie authors in the space use BookFunnel or Prolific Works to give away extended excerpts or even a free prequel short story as a newsletter incentive. You sign up, they email you a legit download link. It’s a good system because you’re getting it directly from the creator, and the quality of the sample is usually hand-picked to hook you. I’ve discovered a few favorite series that way, where the free chapter was so well-crafted I bought the whole book immediately after. The key is following your favorite authors on social media—they promote those sample drops all the time.
Subscription services are another angle. Apps like Radish or Kindle Unlimited often let you read the first several chapters for free without a subscription, which is basically a long preview. The selection can be hit or miss, but when you find something, you’ve already got a chunk of the story to dig into before you decide to use a credit or buy it outright.