34 original cello duets from Renaissance, Baroque, Classic, Romantic and Modern periods. I consider this a broad range of intermediate, both parts are of similar difficulty, staying within 4th position and A harmonic, no more than 2 sharps or 2 flats. A comfortable note range, but a lot of variations in rhythms and challenges. This is a thick book, both parts on a page in score form. Spiral binding is recommended. Works by Morley, Simpson, Gabrielli, Boismortier, Corette, Giordani, Schetky, Boccherini, Hook, Schonebeck, Reinagle, Dotzauer, Kummer, Lee, Offenbach, Hindemith, Zehm, Koeppen, Waterhouse, Amanti.