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 & more scales until y ou master all the major scales and feel comfortable with them. This book deals with all major scales up to those with three s harps or flats in their key signatures - first in the form of an exercise and then in a short fun piece.