A specialist in twentieth-century European and American art, Bois is recognized as an expert on a wide range of artists, from Henri Matisse and Pablo Picasso to Piet Mondrian, Barnett Newman, and Ellsworth Kelly. He has curated and co-curated a number of influential exhibitions, including Piet Mondrian, A Retrospective (1994); L'informe, mode d'emploi (1996); Matisse and Picasso: A Gentle Rivalry (1999); and Picasso Harlequin 1917–1937 (2008). His books include Ellsworth Kelly: Catalogue Raisonné of Paintings, Reliefs, and Sculpture: Vol. 1, 1940–1953 (2015); Matisse in the Barnes Foundation (2015); Art Since 1900 (with Benjamin Buchloh, Hal Foster, and Rosalind Krauss, 2004); Matisse and Picasso (1998); Formless: A User's Guide (with Rosalind Krauss, 1997); and Painting as Model (1990). Bois is currently working on several long-term projects, foremost among them the catalogue raisonné of Ellsworth Kelly's paintings and sculptures, the second volume (out of five) of which he plans to finish this year.