Founded in 1963, Hennessey + Ingalls has grown to become the largest art, architecture and design bookstore in the western United States. After more than 50 years on the Westside, in February 2016 Hennessey + Ingalls moved into the sprawling One Santa Fe complex in the Arts District of Downtown L.A. The family-owned store is managed by founder Reginald Hennessey's son, Mark.

Hennessey + Ingalls is renowned for their curated selection of books in art and art history, all phases of architecture, photography, interior design, graphic design, and landscaping. Top art directors in film, television, and advertising shop at Hennessey + Ingalls because of the in-depth collections and the knowledge of the staff. Clients include many of the country's leading architectural firms, along with museums, collectors, art galleries, students, interior designers, graphic design firms, and schools.