In 1929 he also studied composition privately with Alois Hába and composed Fantasia for Quarter - tone piano.
Following the death march and liberation he returned to Prague, where he reunited with his wife Hana (she also survived the imprisonment in concentration camps).
[4] Reiner's musical output was created during fifty years, since 1928/9 to 1979, and was firmly connected with the political situation in Czechoslovakia in the 20th century.
He composed for almost all instruments, including bass clarinet, dulcimer, solo drums and for baritone saxophone.
A re-interpretation of songs from the Květěný kůň cycle and a performance from the Terezín ghetto Staročeská Esther was prepared by Aida Mujačič.