Used and Rare: Travels in the Book World (1997) (with Nancy Goldstone)
Slightly Chipped: Footnotes in Booklore (1999) (with Nancy Goldstone)
Warmly Inscribed: The New England Forger and Other Book Tales (2001) (with Nancy Goldstone)
Out of the Flames: The Remarkable Story of a Fearless Scholar, a Fatal Heresy, and One of Therarest Books in the World (2002) (with Nancy Goldstone)
The Friar and the Cipher: Roger Bacon and the Unsolved Mystery of the Most Unusual Manuscript in the World (2005) (with Nancy Goldstone)
Deconstructing Penguins: Parents, Kids, and the Bond of Reading (2005) (with Nancy Goldstone)
Dark Bargain: Slavery, Profits, and the Struggle for the Constitution (2005)
The Activist (2008)
Inherently Unequal (2011)