The Willis E. McNelly Science Fiction Collection: Philip K. Dick contains correspondence, manuscripts, and publications documenting the author's literary career from 1959 to 1985. The manuscripts include original typescripts and carbon copies of both published and unpublished short stories, novels, and essays, showing Dick's creative process through various drafts and revisions. Extensive correspondence between Dick and his publishers, literary figures, family members, and fans provides insight into both his professional relationships and personal life.

The collection features a comprehensive gathering of Dick's published works, including appearances in major science fiction magazines, foreign language editions, and critical works about his writing. Additional materials include screenplays of film adaptations like Blade Runner and Total Recall, materials from the Philip K. Dick Society such as newsletters and pamphlets, and the Cynthia Goldstone Archive containing personal correspondence and inscribed editions. Together, these materials provide a thorough record of Dick's development as a writer, his publishing history, and his lasting influence on science fiction literature and popular culture.

The collection is organized into five main series: Manuscripts, Correspondence, Publications, Screenplays, and the Cynthia Goldstone Philip K. Dick Archives. Materials are housed in 42 document boxes and arranged chronologically within each series.