Paganini's Sonata a violin solo (MS 6), composed during his Lucca period (1805-1809), forms part of a series of music written for solo violin that has failed to attract the attention of both performers and scholars interested in Genoa's famous violinist. This work - published several times in the nineteenth century (especially outside Italy, with various titles: Duetto for solo violin, Duo Marvel, Meraviglia di Paganini word etc.) - is divided into two movements (Adagio - Allegro molto). Paganini used a two-staff system of musical notation to produce two distinct levels of sound, as well as graphically: pizzicato on the lower line, arco on the upper. It is a short, pleasing piece, containing all the typical characteristics one expects from Paganini: melody and instrumental virtuosity. This critical edition, based on the autograph kept at the Casanatense Biblioteca in Rome, is part of a collection of the most important editions from the 1800s and 1900s, which is intended to provide scholars and performers with an original version.