The major-label debut from the 25-year-old, Dr. Dre-endorsed Kendrick Lamar, good kid, m.A.A.d city, is the Dark Knight of albums: led by a conflicted hero, it is rich, brainy enough not to be too brainy and utterly crowd-pleasing. Billed on its cover as "A Short Film by Kendrick Lamar," it's actually a feature-length narrative through his youth in Compton. The songs are so conversant with one another that Esquire even posted a sort of Cliff's Notes plot outline.