Bergson, Henri, An Introduction to Metaphysics, translated by T. E. Hulme, Liberal Arts Press, 1949.

Hulme is credited with creating the initial philosophy
behind the Imagism movement. His inspiration
came from two sources, the symbolist poets in France
and Bergson's metaphysics philosophy. This could
be considered the book that started it all.

Carpenter, Humphrey, A Serious Character: The Life of Ezra Pound, Houghton Mifflin, 1988.

After meeting with T. E. Hulme, Pound formulated
Hulme's ideas and organized the Imagism movement
around them. Although Pound's poetry is not totally
representative of the imagist tenets, his writing was
influenced by the movement that he started. As one
of the most noted American poets, the reading of his
life story offers an interesting background for the
study of American poetry.

De Chasca, Edmund S., John Gould Fletcher and Imagism, University of Missouri Press, 1978.

De Chasca studies Fletcher's poetry and offers his...