Chess Opening Essentials, Volume 4:

This volume helps beginners to develop a solid understanding of fundamental opening ideas, gives casual players the ability to choose the opening that suits their style and taste, is a tool for club players to test and review their opening repertoire, as well as a reference book to which advanced players keep returning. The authors do not propagate forcing tactical variations to be memorized mechanically, but explain what you should actually be trying to achieve when playing the opening of your choice.