Composed by Joseph Bonnet  Douze Pièces Op.7 is a set of Organ studies for upper intermediate players. An index at the beginning gives an English translation of the terms used in the book. It features: 1. Dédicace 2. Étude de concert 3. Clair de lune 4. Stella matutina 5. Songe d’enfant 6. Chant de Printemps 7. Prélude au Salve Regina 8. Romance sans Paroles 9. Pastorale 10. Deuxième légende 11. Elfes 12. Caprice héroïque Joseph Jongen was a Belgian organist composer andprofessor of harmony and counterpoint. He won the Belgian Prix de Rome and composed numerous pieces including music chamber works symphonies concertos and songs. His most famous piece is the Symphonie Concertante (1926).

Composed by Théodore Dubois Douze Pièces is a set of Organ studies for upper intermediate players. Each piece is dedicated to a famous organist and an index at the beginning gives an English translation of the terms used in the book. It features:  1. Prélude in F 2. Offertoire in E 3. Toccata in G 4. Verset de Procession in D 5. Offertoire in E flat 6. Verset-Choral in A minor 7. Fantaisie in E 8. Méditation in E flat 9. Marche des Rois Mages in E 10. Offertoire in E flat 11. Cantilène nuptial in Aflat 12. Grand choeur in B flat The most famous of these pieces is definitely the n°3 Toccata in G which is also one of Dubois’ most renowned works. This piece also exists on its own as a separate score and can be found on the Musicroom website.