Instruct: Classify Amazon reviews into positive or negative sentiment
Query: arty has lost it

i found all the other books in this series great reads, i would review them as five star, i found this book lacking in a rational plot, in most places everything is made to convinient, or the places were eoin colfer couldn't make the book convinient he seems to have made it totaly irrasional. It is with a sad heart i give this book only two stars.