Instruct: Classify Amazon reviews into positive or negative sentiment
Query: if you need something small

As a portable handbook and quick reference it contains some useful information if you need something to carry in your pocket, beyond that I feel if you have a graphics standards or building construction illustrated you are better off. The cost estimation is a bit simplistic but useful, but does not offset the lack of information. Plenty of areas are covered with only the most generalized and basic information. Reason for two stars: should be a 10 dollar notebook.