Billboard calls Battle Studies “the best and most adventurous of Mayer's four studio albums.” Our matching folio features all 11 tunes: All We Ever Do Is Say Goodbye • Assassin • Crossroads • Do You Know Me • Edge of Desire • Friends, Lovers or Nothing • Half of My Heart • Heartbreak Warfare • Perfectly Lonely • War of My Life • and Who Says, plus notes on the making of the record.