Kate Walker and friends 

Why does a secondary school teacher need blood to survive? Why does a secret agent take a job in the same school? What kind of strange school is, where the owner of the school(who is the principal as well) continuously experiments with the students and with the workers of the school too? 

Why does the same principal (who is extremely strict and sometimes cruel with his subordinates) allow a totally uneducated(but attractive) girl working in a very important position in the school?

There is no one normal in this school? 

Read this astonishing book and you will find out!