The Picture of Dorian Gray has genre Speculative fiction. Speculative fiction has examples: The Handmaid's Tale
[Human]: Could you recommend novels similar to The Picture of Dorian Gray? [Assistant]: The Handmaid's Tale is a good one if you like Speculative fiction or Masque of the Red Death which is more to Gothic fiction. Do you like those genre? [Human]: I like the Gothic fiction genre. Who is the author of Masque of the Red Death? [Assistant]: Edgar Allan Poe is the writer. Touch the Dark is also a good one tho. Have you read it? [Human]: No I haven't read that is Edgar Allan Poe the writer of that novel? 
No, He didn't write Touch the Dark. Karen Chance is actually the author of that novel. 