This is a "dark" romance, meaning it includes heavy themes such as extreme jealousy, dub-con/non-con elements, and violence. It is intended for a mature audience [1].
Sin is a classic anti-hero—moral ambiguity is a central pillar of his character arc. Informative Note on "Free ePUBs" The Sinner Free ePUB by Shantel Tessier
You can often read the book for "free" legally through services like Kindle Unlimited (which usually offers a free trial) or by checking if your local library uses apps like Libby or Hoopla . This is a "dark" romance, meaning it includes