Is Ajahn Brahm quite an unconventional Buddhist teacher? He seems to enjoy speculating about how existence, why we're here, the nature of the universe, other religions. I guess the fact that he was a physicist has something to do with it. He also talks of reincarnation a lot, but rarely mentions the word rebirth, and he always talks of it in human terms, i.e we always reincarnate back to another human for another adventure.
From a lot of the stuff I've read on this site, he seems to have a quite different approach in his personal interpretation of Buddhism.
"The original heart/mind shines like pure, clear water with the sweetest taste. But if the heart is pure, is our practice over? No, we must not cling even to this purity. We must go beyond all duality, all concepts, all bad, all good, all pure, all impure. We must go beyond self and nonself, beyond birth and death. When we see with the eye of wisdom, we know that the true Buddha is timeless, unborn, unrelated to any body, any history, any image. Buddha is the ground of all being, the realization of the truth of the unmoving mind.” Ajahn Chah