Though only Steppewolf's third release in two years, 1969's AT YOUR BIRTHDAY PARTY isn't as flawless and inspired as the band's two previous recordings. But the album still packed quite a wallop and spawned yet another rock-radio standard, "Rock Me." One of the band's more underrated albums, even among longtime fans, AT YOUR BIRTHDAY PARTY contains typical Steppenwolf rockers like the aforementioned "Rock Me," "Jupiter Child," and "It's Never too Late." The experimental space rocker "Mango Juice" is comparable to Syd Barrett-era Pink Floyd. Soon after AT YOUR BIRTHDAY PARTY, Steppenwolf's lineup began to resemble a game of musical chairs. Band members came and went, with founder/leader John Kay remaining the only constant member.