 The "blue" book (volume 3) contains a number of longer anthems, and the "red" book features fifty carols arranged for sopranos and altos.In July 2011, Oxford University Press published the fifth incarnation of the original series, "Carols for Choirs 5", edited by composer Bob Chilcott, to celebrate the 50th anniversary of the publication of the first volume.Oxford University Press later expanded the series with volumes appropriate for other church seasons, for example