I don't pay attention to books all over tik tok but I do tend to gravitate towards them without even knowing. It's not an obsession. People just like the books they like especially if the blurb sounds interesting. It just ends up being a good book that many people just happen to enjoy.

And btw, It Ends With Us is relatable for those of us who have been through DV situations. If you haven't been through it then ya you probably won't enjoy the book because you don't relate and that's fine.