Manuel de Falla's personal library provides a unique resource for the study of the composer's assimilation of ideas and their impact upon the poetic conception and stylistic development of this modernist Hispanic artist. The integrity of the surviving collection, when studied in conjunction with his voluminous correspondence, compositional sketch material and working papers, permits a multi-faceted study of Falla's creative process. An outline of the ways in which Falla employed his library and the traces he left in the process is presented.