Book excerpt: The Harvard Law Review is offered in a digital edition, featuring active Table of Contents, linked footnotes and cross-references, linked URLs in notes, legible tables, and proper ebook formatting. This current issue of the Review is April 2012, the sixth issue of academic year 2011-2012 (Volume 125). Featured articles and essays in this issue are from such recognized scholars as Cary Franklin (in an article on inventing the "traditional concept" of sex discrimination), Richard Pildes (on law and the President, in an essay reviewing a book by Eric Posner and Adrian Vermeule), and Robert Weisberg (on the tragedy of crime and criminal law, reviewing a book by the late William Stuntz). Student contributions explore the law relating to everlasting software; incarcerating immigration detainees; the First and Fourteenth Amendments; Sixth Amendment implications of napping defense counsel; copyright under the 'first sale' doctrine; war powers in Libya; and eyewitness identification evidence.