I enjoy the PLL series, I don't really think I can explain why, but it is a bit of a guilty pleasure. With this series, you really do have to suspend your disbelief quite a bit, but that being said, this book pushed that beyond what even I could tolerate. A crazy amount of this book just made no sense whatsoever. 
 SPOILERS FROM HERE 
 First off, these girls all come from middle to upper middle class families. How many people really think that their parents would let them get carted off to prison and not provide an attorney? Additionally, I remember being in high school (it wasn't that long ago!) and I know for a fact we learned about Miranda rights, so how can four extremely well educated girls not realize that they don't have to talk to the FBI, police, etc. without an attorney present? Seriously, I am willing to accept that they do bad things and make poor decisions in that regard, but don't make a big deal about them getting into Ivy League Schools and fancy international art programs and then pretend like they are uneducated or just plain dumb. 
 Additionally, I understand that these books need to make the adults go away so that the girls can get themselves into trouble, but even previous installments never made the adults quite so stupid. The behavior of the FBI agents was seriously just outrageous and moronic, it is really no wonder the girls were able to get away with so much if all the adults in their world are this dumb. 
 Other than that, it was a typical PLL book, lots of back and forth, the girls are in trouble, then they are not, etc. I don't know why these books are addictive but they still are and I am stubborn enough to want to read through the end of the series.