Is this book a knockoff of another by the same title authored by Natalie Haynes? Both books have the same story line, with only subtle changes in this account. For example in Natalie's book, the teacher is named Alex, but in this one, Alex is a student. In one, the teacher is narrator, in the other, a student. In one, the tragedy was a fiance, the other, a father and sister. Am I the only one who has noticed this??