This book is a good book in the series and is fun to read, I read it so fast because it was that good also it doesn't require you to remember all of book 8,

all you really need to remember is the girl at the end the brief introduction of the 4th mystery but omg the shit the author puts us hananene shippers through, I will cry if I have to see her kill amane also if he likes her then that must mean that she secretly wishes that he liked her but god