Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Not her best

This book allows Christie to draw on her considerable archaeological knowledge based on her experiences on digs with her archaeologist (second) husband. The setting is an intriguing change from her usual. However, I found the plotting in this one to be a little thin. I rarely figure out Christie's culprits in advance, but I saw right through this one. Read it for an interesting change of pace, but don't expect to be deceived.