His first collection, "Far Cry", was published in 1943. He continued to publish throughout his lifetime and was prolific in the amount that he produced. After his death a still larger collection of unpublished poems was found. MacCaig often gave public readings of his work in Edinburgh and elsewhere; these were extremely popular and for many people were the first introduction to the poet. His life is also noteworthy for the friendships he had with a number of other Scottish poets, such as Hugh MacDiarmid and Douglas Dunn. He described his own religious beliefs as "Zen Calvinism", a comment typical of his half-humorous, half-serious approach to life.