When former Gov. Mitch Daniels was pushing to keep liberal historian Howard Zinn’s readings out of Indiana classrooms three years ago, he had a definite idea of what should be there instead: conservative education leader Bill Bennett’s review of American history.

News that the new Purdue University president tried to have Zinn’s “A People’s History of the United States” kept from classrooms has sparked a surge in demand for the 1980 book at Indiana libraries. It also put Daniels on the defensive over the past month, drawing condemnations from academics nationwide and having him reiterate his support for academic freedom in higher education even as he is steadfast in his belief that Zinn is wrong for lower grades.

Emails obtained by The Associated Press through a public records request show Bill Bennett had much more favor among Daniels and his advisers. In January 2010, when Daniels discovered the board of education had changed the state’s textbook rules to allow Bennett’s book, he quickly asked how soon his advisers could get copies of “The Last Best Hope” in classrooms....