Anton Horner was for many years the hornist for the Philadelphi Orchestra with an excellent reputation both in the US and Europe. In this book he addresses the problem of students pushed into advancing too quickly into the higher registers, which he believes prevents the correct development of the embouchure.
Fingering charts are included. Initially the pieces are more mechanical and simple, but they progress to being more tuneful and interesting.
Think of this book as a method for beginners that will help them progress properly to the next phase.