 "Carols for Choirs 2" was published in 1970.The books in the "Carols For Choirs" collection came to be regarded as standard choral texts throughout the English-speaking world and were highly influential; according to the composer John Rutter, they "changed the whole sound of Christmas for everybody who sings".Choir singers usually refer to the books by the colours of their covers, with the "green" and "orange" books (volumes 1 and 2) being the most widely used.