SURFIN' USA was The Beach Boys' second Capitol album, and was their first to go Top Ten. It contains the hits "Surfin' USA" (based on Chuck Berry's "Sweet Little Sixteen"), and "Shut Down," along with five surfing instrumentals, and other tracks such as "Lonely Sea," originally recorded on their 1962 demo. It was first released on CD as a Mobile Fidelity "two-fer" (Surfer Girl & Surfin USA) in 1989, and then was issued by Capitol as a "two-fer" (with Surfin' Safari) in 1990. The "two-fers" were broken up into separate CDs in the mid-'90s, but then resurfaced in 1997 as Canadian imports, and then were remastered and reissued in the USA in 2001.
The 2012 version of SURFIN' USA has both the mono (making its CD debut) and the stereo versions of the album. Both are nice to have, but if all you care about is the stereo version, stick with the Surfin' Safari / Surfin' USA "two-fer" mentioned above, which has bonus tracks. It's not The Boys' best work, but they would get a lot better next time.
NOTE: Like other reviewers, I also noticed that the front cover art, like the "two-fer," has the ten-song track listing from the budget-line reissue, instead of the full twelve-song version. Doesn't Capitol have the original cover in their vaults somewhere?