As Cook continued to compose, he also produced many successful musicals. Chief among them was "In Dahomey: "(1903). This is generally considered Cook's landmark show, which was developed with Williams & Walker, who starred in it. J. A. Shipp wrote the book, and poet Paul Laurence Dunbar the lyrics. Theatre historian Gerald Bordman says that this is "the first full-length musical written and played by blacks to be performed at a major Broadway house." It was also notable for featuring the two leading vaudeville performers of the day, and for satirically addressing elements of African-American and US history, developing its characters well beyond the stereotypes of the day. After its opening, the musical was taken on tour to the United Kingdom. It returned in a revival in New York in 1904, and then toured the United States as well.