Tommy is correct. Alive! is very nearly the only KISS album you need.
If you find yourself wanting more, the studio follow-up to it, Destroyer is also very good. By Love Gun (the album after that), they had already become parodies of themselves, though there are a few good songs on that one as well. Despite the fact that these albums came out in the mid-70's, 90% of the songs at most KISS concerts will be from these three albums.
Also, it may not be the "official" way to write it, but I often see the name of the band written in all caps. This also helps prevent confusion about that activity involving lips and another person.