Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Exhausting in it's snail-like pace.

I feel as if I have walked the length and breadth of Scotland after reading this plodding and tiresome book. The pacing is glacial. What is supposed to be an "internet" riddle and response game is handled as if the participants are writing letters to each other. Clues are dropped like fish and chip wrappers and then forgotten or weakly explained..or not. The climactic chase scene (SPOILER ALERT!) features an overweight, alcoholic detective lumbering after an 80-year-old senior citizen, and STILL takes up two pages! According to other reviewers, this is the weakest of the series so I will try another volume. Hopefully there will be a better story and writing than this attempt.