Question: what order to read the pretty little liars books?
Answer: Book 1. Pretty Little Liars: Number 1 in series. Book 1. ...  Book 2. Perfect. Book 2. ...  Book 3. Wicked: Number 5 in series. Book 3. ...  Book 4. Killer: Number 6 in series. Book 4. ...  Book 5. Heartless: Number 7 in series. Book 5. ...  Book 6. Wanted: Number 8 in series. Book 6. ...  Book 7. Twisted: Number 9 in series. ...  Book 8. Ruthless: Number 10 in series.