Concerning the Spiritual in Art
Hilma af Klint: Painting the Unseen
The Spiritual in Twentieth-Century Art (Dover Fine Art, History of Art)
Illumination: The Paintings of Georgia O'Keeffe, Agnes Pelton, Agnes Martin, and Florence Miller Pierce
Hilma af Klint: A Pioneer of Abstraction
Tantra Song: Tantric Painting from Rajasthan
The Fourth Dimension and Non-Euclidean Geometry in Modern Art (Leonardo Book Series)
The Blaue Reiter Almanac
Vitamin P3: New Perspectives in Painting
Agnes Martin: Her Life and Art