I read this when I was a child, most likely between the ages of 10-13. I remember really liking it, as I enjoyed books told in diary format, and this book is told through recordings made on cassette tapes, which as a child I thought was the neatest idea ever.
**I'm super vague, but this could be a spoiler**
The thing that happened at the end... I forgot it was coming. How did child me handle it, I wonder?
I love that this book could still make me have such a strong emotional reaction. It held up with time, though obviously dated with usage of tapes. Everything else is still very relatable.