Of all the legends of pop music, the Beach Boys are the most confusing. For many of us, they’re the all-American, surf-and-sun harmony hitmakers of California Girls and I Get Around, a cheesy throwback beloved of television adverts and wedding DJs. But for the serious music snob, they are pop music’s greatest achievement and the vessel of its most revered genius, a singularly inspired musical savant who sacrificed his sanity in pursuit of pure and sacred art.