Good book, lots of info about lots of the rocks I am looking at (how to identify them by their properties) and info about the groups they are in. Some identifying tables in the back - I have not used them but when I asked a 3rd year they said that there are better/easier ways than using the tables the book provided. Has been useful for me identifying ores. No colour pictures which is sad and a bit unhelpful (I would imagine) when looking at the thin section pictures - there are however many pictures and diagrams.
I like it and think it was worth the money though there are others around that may well be worth a look.