In this book Emily Beynon presents a selection of études from Ernesto Köhler and Giuseppe Gariboldi with a new approach. The well-known études are all provided with a second part that can also be used as an extra study. In addition, a page of preparatory exercises precedes each étude. The valuable experience of playing together is also possible using the MP3 audio tracks available online, which contain two versions of each piece: a duet version and the second part alone to play along.Köhler and Gariboldi not only offers effective study material, but also the unique opportunity to play these popular études as duets - in lessons, at home, or on the concert stage.