Thomas Jefferson: The Art of Power, at No. 12, is Jon Meacham's portrait of the third president.
At No. 12, M.L. Stedman confronts miscarriages and a failing marriage in The Light Between Oceans.
Malcolm Gladwell's David and Goliath, a study of upsets in balances of power, returns to No. 1.
National Book Award winner James McBride tells a slave's story in The Good Lord Bird, at No. 14.
The lists are compiled from weekly surveys of close to 500 independent bookstores nationwide.
For 25 seasons, The Simpsons writers have been smuggling math onto Americans' TV screens. Author Simon Singh helps Ira decode the show's numberplay, while former Simpsons writer David X. Cohen remembers how he helped Homer solve Fermat's Last Theorem (sort of).