Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Poorly researched and poorly written

I never understood what all of the excitement was about "The Da Vinci Code" and this is just slightly better written, in my opinion. Da Vinci was essentially a really bad detective story with historical speculation cribbed directly from other sources inserted throughout."Angels & Demons" works slightly better as a thriller, but the dialogue is cheesy and I find it hard to believe that the female lead would fall in love with Robert Langdon so quickly and especially so quickly after the murder of her father.Also, how poor does your research have to be if you don't know that cell phones done have dial-tone? This is mentioned at least a dozen times. Dan Brown didn't own a cell phone in 2000? I find that hard to believe. Just lazy writing. Could have been changed to checking for a signal and wouldn't have seemed like just poor and lazy research.