This book is well suitable for kids that are in 2nd to 5th grade. This is because it gets them excited about joining middle school, which is great. even though the book is about NIkki getting bullied, it also shows how she adjusts to the new school and make new friends, which comforts kids that move to new schools. It talks about common things that happen at school, like having a crush, bullying, making new friends, arguments with your siblings, etc. It is very funny and encouraged m start writing a diary too.