35 Studies for Clarinet Vol. 2 by Gaetano Labanchi edited by David Weber and David Gould. International Music Diffusion, SS, 55 pages. This book contains 17 of Labanchi etudes in major and minor keys from 4 flats and sharps through 7 flats and sharps. It also has a 5 page clarinet duet. These etudes are quite challenging and helpful for the serious student. Note: C148 includes these etudes (and more), but not the duet.