The advancements of Brian Wilson -- and the Beach Boys' music under his direction -- had matured tremendously in the months between the "Fun, Fun, Fun" sessions and the recordings found on this triple-disc set. Wilson's progress as an arranger, as well as his revolutionary recording techniques are not only intriguing to recount, but they were also selling millions of records worldwide. By the late spring of 1964, the initial impact of the Beatles -- the Beach Boys' labelmates -- on pop music had a peculiar impact on Wilson. Above all, it inspired him to take his craft further than ever before. The complex arrangements for "All Summer Long" and "I Get Around" are mesmerizing. As Wilson searches for a perfect instrumental take, layers of sound become unraveled and what was once obscured can now be heard. One begins to get an idea of how densely packed these "pop" melodies truly are. There are a few hidden gems among the lesser-known tracks on All Summer Long: "Do You Remember," "Drive-In," and "Don't Back Down." On this Unsurpassed Masters volume, both instrumental and vocal versions of all three takes bring out some amazing sonic revelations. It's kind of like being in the studio as the tracks are being laid down. In addition to the dozen cuts recorded for All Summer Long, alternate versions of "Little Honda" and "Don't Back Down" are also included here. The vocal sessions for all tracks are at times brilliant beyond description. A few highlights include "Girls on the Beach" which reveals rich and warm vocal harmonies with a freshness that gets buried on the issued version of the song. The same crisp presence also graces "Hushabye" as well. Beach Boys fanatics should add this volume to their list of "must-have" bootleg titles.