This is a very good book which covers all the things you need to know for overcalls and their responses in Bridge. It is quite complete with all its examples but does come up lacking in a good summary of supplying the rules to use to determine what to do at the table. This seems true of a couple of his books. I would strongly suggest there be some attempt to set down logical rules to be used as a framework for figuring out what needs to be done rather than trying to memorize all the possibilities. Even without this, it is still a very good book and needs to be read if you want to learn about overcalls.