Steve, the Green Pajamas are a shapeshifting band if ever there was one. Their albums each of have their own distinct sonic signature. Summer of Lust leans toward the garage band sound, less polished or produced than some of their others, but I still like it.
Brian, I'd recommend Phantom Like: Northern Gothic, Poison in the Russian Room, or If You Knew What I Dreamed to get started, and if you like any or all of those, start exploring. They've been around for 35 years or so, so it is indeed a pretty extensive catalog.