Petar Ralchev's book Balkan Accordion extends the instrument's rhythmic, tonal and harmonic spectrum. It contains a diverse range of well-known instrumental pieces, songs and dances with a distinct Eastern European flavour and with catchy melodies and rich ornamentation. For each piece the author has written a short introduction on its background and characteristics. The pieces are intermediate level and the notation is clear and easy to read.

• Trad. Romania, Moldova: Batuta
• Trad. Turkey: Nihavend sirto
• Trad. Romania, Moldova: Lautareska
• Trad. Bosnia-Herzegovina: Jutros mi je ruja procvetala
• Trad. Macedonia: Raikos
• Trad. Macedonia, Bulgaria: Jovano Jovanke
• Trad. Greece: Sirto pilitiko
• Trad. Macedonia: Kasapsko oro
• Trad. Serbia: Moravac
• Ralchev Petar: Plovdivsko horo
• Ralchev Petar: Daichovo horo
• Ralchev Petar: Stamboliyska rachenica
• Ralchev Petar: Krivo horo
• Trad. Serbia: Uzicko kolo