Roger Olson is a professor of theology. He once taught on the same faculty as John Piper. His book, The Mosaic of Christian Belief: Twenty Centuries of Unity & Diversity is a wonderful introduction to Systematic Theology (Dallas Theological Seminary – one of the most conservative of seminaries, uses this book as a text book for their distance theology course). And Roger Olson is one of the most articulate defenders of Arminianism.
Check out his blog even if you disagree with his position. This godly man who loves Jesus is very thought provoking and will challenge you to think deeply about faith even in the areas you disagree with him in.
Check him out HERE
And check out THIS post – very interesting