It Happened to Anna is a book that touches a lot on toxic relationships and friendships, grief and social isolation. It is a middle grade so I did find the twist to be pretty predictable, but I think the foreshadowing would be great for middle grade readers. I like that it gives a very realistic look at how toxic friendships develop and I think for adult readers it can easily reflect an abusive relationship or grooming. There was some age-appropriate violence and self-harm that gave stakes to the story. 

Our main character is depressed and understandably so as she has lost her mother and for her entire life has been isolated from friends due to the haunting. Even with a supportive system, she struggles to see how isolated she is becoming and the negative choices that she is making. I did like that the book tackles bullying and peer pressure in a way that I think is very current and speaks to some of the "prank" trends that are increasingly popular on social media. 

I recommend if you enjoy middle grade horror!