El Cancionero: Mas y Mas is a four-CD box set by the American rock band Los Lobos, released in 2000. It contains album tracks, live recordings, rarities, and alternate versions, as well as tracks from solo and side projects, soundtracks, and tribute albums. Of the eighty-six tracks on the box set, eleven are previously unissued. "El Cancionero" translates as "songbook" or "the person who interprets songs," according to guitarist/drummer Louie Pérez. The set was the subject of an essay by author Nick Hornby in his collection Songbook.