So after reading Rose in Chains which is rewrite of what was a Draco/Hermione Harry Potter fanfiction, I had to give the recently released Alchemised a go, which is another book that also comes from a HP fanfic. I was a bit hesitant to read it, since I heard there was a lot of torture (and I like my books to be a bit lighter than that..). Basically the plot is what would happen if Voldemort won the war, and Hermione is forced to live with Draco - very classic tropey fanfiction stuff.
I did find myself to be pleasantly surprised though! The world building is really good and is pretty different from the HP universe. You can tell that the main characters are Hermione and Draco, but the other characters have been sufficiently changed so that they feel like real characters rather than drop-in replacements for Harry Potter characters. The first third definitely has some dark themes and I felt a bit daunted by what I was getting into, but the second third is a bit lighter as you get to go back to the time before Helena (i.e. Hermione) was imprisoned. And there is a bit of hope in the final third as everything comes towards a “happy” (ish) ending.
I’m not sure I would recommend the book for someone who is not interested in fanfiction to begin with, since there are still some tropes that the author kept in that I side-eye (uhh a breeding program to deal with the lack of wizards, which luckily doesn’t go too in-depth). But if you’re a fanfiction kind of person, then this is definitely a step above that, and a really good read.