Debré, Patrice.Louis Pasteur. Johns Hopkins University Press, 1998. Originally published in French for the 100th anniversary of Pasteur's death in 1895.
Greison, Gerald L.The Private Science of Louis Pasteur. Princeton University Press, 1995. Well-documented biography that draws on Pasteur's laboratory notebooks as well as his published papers.
Reynolds, Moira Davison.How Pasteur Changed History. McGuinn & McGuire, 1994. Summarizes Pasteur's accomplishments and their consequences, includes a history of the Pasteur Institute.