If you see a house under construction it's on its way to becoming a complete home for people to live in. with Scales Under C onstruction it's much the same: step by step you'll build up a framework while learning to play more and more scales until you master all the major scales and feel comfortable with them. This book deals with all major scales up to those with three sharps of flats in their key signatures - first in the form of an exercise and then in a short fun piece made up of scales.