Pebbles is an extensive series of compilation albums in both LP and CD formats that have been issued on several record labels, though mostly by AIP. Together with the companion Highs in the Mid-Sixties series, the Pebbles series made available over 800 obscure, mostly American "Original Punk Rock" songs recorded in the mid-1960s — primarily known today as the garage rock and psychedelic rock genres — that were previously known only to a handful of collectors. In 2007, the release of the Pebbles, Volume 11: Northern California CD marked the final album in the Pebbles series (curiously, Vol. 12 had been issued in 1999). The following year, Bomp! marked the 30th anniversary of the original Pebbles album with a spartan, limited-edition, clear-vinyl reissue complete with the original pink cover insert. The Pebbles series played a significant role in the emergence of a "canon" of garage-rock music and artists in the late 1970s and early 1980s. In his review of the Pebbles series for Allmusic, Richie Unterberger comments: "Though 1972's Nuggets compilation reawakened listeners to the sounds of mid-'60s garage rock, it only focused on the tip of the iceberg. Behind those forgotten hits and semi-hits lurked hundreds, if not thousands, of regional hits and flops from the same era, most even rawer and cruder. . . . More than any other factor, these compilations [in the Pebbles series] were responsible for the resurgence of interest in garage rock, which remains high among collectors to this day." Including the Highs in the Mid-Sixties series, Best of Pebbles series, Essential Pebbles series, Planetary Pebbles series, and two box sets, more than 60 compilation albums have been released using the Pebbles name. Following on the heels of the success of the Pebbles series, dozens of other series of garage rock compilation albums have been started, with numerous albums being released each year for several decades. "Pebbles" compared with "Nuggets" The name "Pebbles" is a derivative of the name of the seminal Nuggets album of similar music; since in almost all cases, the recordings compiled on these albums were lesser known regional hits or releases with little or no national exposure. By contrast, several of the bands presented on the original Nuggets compilation had one or more national hit songs, such as the Seeds, Blues Magoos, Electric Prunes, the Standells, Count Five and others. As additional albums were released under both of these names