Mid-twenty-first century time traveler Sierra Waters, fresh from her mission to save Socrates from the hemlock, is determined to alter history yet again, by saving the ancient Library of Alexandria - where as many as 750,000 one-of-a-kind texts were lost, an event described by many as "one of the greatest intellectual catastrophes in history." This is the novelette. -- first published in Analog Magazine in 2008 -- which later became the first two chapters of the novel of the same name.