The Essential Guidebook & CD Package by Mike Campbell and Tracee Lewis is designed to help you master harmony singing like a professional. This comprehensive lesson from the expert instructors at Hollywood's Musicians Institute includes topics such as creating your own harmonies, music reading, scales, chords, and intervals, as well as techniques for both stage and studio performance. It also features advanced drills for experienced singers and more. The package includes 18 authentic songs across various genres, including pop, rock, blues, funk, soul, and country, along with a CD containing 99 full-demo tracks.