Summer Days (And Summer Nights!!) is the ninth long player to contain new and original material by the Beach Boys in less than four years. It is also a continuation of the artistic resilience which would ultimately lead to the Pet Sounds and Smile projects. While the quality in sound and packaging is again top shelf for Unsurpassed Maters, Vol. 9, the recorded contents of the four-disc box set are woefully incomplete. The reason there are no vocal sessions owes to the fact that they were recorded at Columbia Studios to accommodate Brian Wilson's desire to record the Beach Boys vocals using a state of the art eight-track tape machine. Those tapes were subsequently filed at Columbia and considered lost or destroyed until a search in the early '90s uncovered them again. The end result is this collection, which was compiled prior to the recovery of those tapes. What is included on this volume is a majority of the instrumental tracking sessions for Summer Days (And Summer Nights!!) and a few peripheral tracks recorded concurrently with the album. Among these stray songs is the single version of "Help Me Rhonda." Another track -- initially named "Sandy" -- was resurrected in 1976 by Brian Wilson and renamed "Sherry, She Needs Me," although it remains officially unreleased. Finally, there is a version of "Graduation Day" recorded as a lip-sync tape for a television performance. Considering the delicate and somewhat introverted nature of songs such as "Let Him Run Wild," "Girl Don't Tell Me," and the overtly Beatle-influenced "You're So Good to Me," there was really no other logical artistic progression that Wilson could have made than the "teenage symphony to God" he called Pet Sounds. The only speed bump would be Capitol Records' demands for more product -- which would be satisfied with The Beach Boys Party! and is the subject of the next Unsurpassed Masters volume.