Cos Cob Press Like Wa-Wan Press, Arrow Music Press and The Composers Press, was an attempt in the first half of the 20th century to spread knowledge of contemporary American composers.
It was founded by Alma Morgenthau Wertheim (1887–1953), a patron of the arts, in 1929. The Morgenthaus were an influential political family, and Alma was married to Maurice Wertheim, a financier, from 1909 to 1929.
Alma named the organization after the village of Cos Cob in Connecticut where she owned a summer residence. However, the organization was located in New York and was organized as a non-profit-organization. Its aim was to spread music of contemporary American composers who in the 1920s experienced considerable difficulties in finding publishers for their music, especially for orchestral works and chamber music.
The press published 35 volumes over nine years. Many composers were published for the first time. The list includes Copland, Chavez, Harris, Ives, Piston and others.
The organization ceased publishing by the end of the 1930s. The catalogue was taken over by Arrow Music Press in 1938 which in turn was bought by Boosey & Hawkes in 1956.