"However they characterized the relationship, they were an unlikely pair. Leibovitz wasn’t apologetic about the fact that she barely read, while Sontag housed 15,000 books in her apartment."

--from Andrew Goldman's feature on Annie Liebovitz in New York, in which we also learn that Liebowitz favors Ordning & Reda notebooks and is mentioned just twice in Sontag's son's memoir SWIMMING IN A SEA OF DEATH.