Can Buddhism be called as Atheist, Agnostic or Theistic?

I am reading this book currently called _Buddhism without beliefs_. In this book the author claims that Buddhism is Agnostic. Now Agnosticism is a claim that you are ignorant, or not sure whether God is there or not. I am sure that Buddhist suttas mention several gods, like Brahma etc. Also most modern scholars promote Buddhism as Atheistic, as there is no central creator. What's your take on this?