Haydn, Hummel and Neruda Trumpet Concerti in Duet Form. Who would have thought? Neil did -- and they work! The first part is virtually the same as the solo part of each concerto and the second part is a condensation of the orchestral accompaniment. And they are not so hard as you might think. This book is a terrific way to increase the engagement factor for these famous concertos -- wonderful for studio class and for recreational enjoyment.