Tevi Troy, in The Washington Post, writes about Presidential reading habits:
In a historical sense, Obama follows a long line of ardent presidential readers, paging all the way back to the founders. John Adams’s library had more than 3,000 volumes — including Cicero, Plutarch and Thucydides — heavily inscribed with the president’s marginalia. Thomas Jefferson’s massive book collection launched him into debt and later became the backbone for the Library of Congress. “I cannot live without books,” he confessed to Adams.