An important piece of American literary history, and one of the few missing selections in digital libraries, is finally becoming an e-book. On her 88th birthday, Harper Lee agreed to let her Pulitzer Prize-winning novel To Kill a Mockingbird be released in electronic form. Lee notes that this is "'Mockingbird' for a new generation," and the title still sells a million copies a year thanks in large part to its popularity in classrooms across the US of A. Here's to hoping we'll get the e-book version of J.D. Salinger's The Catcher in the Rye soon too.