Arminian Theology (by Roger Olson). An excellent overview of Arminian Theology. Olson does not set out to "disprove" Calvinism. Rather, he explains why Arminians believe as they do, and endeavors to clear up common misconceptions. Olson's style is irenic. As the Amazon reviews show, many Calvinists have found this work to be helpful. It is written at a layman / college level.

The Transforming Power of Grace (by Thomas Oden) An exposition on grace. The author's presentation is friendly to the Arminian perspective. Oden draws from what he calls the Paleo-Orthodox consensus (What early Christians agreed on). He quotes from church fathers throughout history. To get the most out of this book It is helpful to have a basic knowledge of church history and the early church fathers. Written at a college / seminary level.

Foundations of Wesleyan-Arminian Theology (by Mildred Wynkoop) This succinct work gives an overview of Arminian Theology from the Wesleyan perspective. In a matter of fact way, the author explains the differences in Arminian and Calvinist Theology. Written at a high school level, this is a great book for the layman who is looking to get his feet wet.

God's Strategy In Human History (by Roger Forster and Paul Marston) The authors take a look at God's interaction with humanity. There is in depth coverage of the scripture passages that Calvinists use, such as Romans 9 and Ephesians 1. Their overview of Romans 9 is masterful. They go into some detail about the Hebrew words that we translate as "harden". They show how the meaning of these words are inconsistently and inadequately translated into the English language. This is relevant to God's interaction with Pharaoh, and helps to give context to the "hardening" of Pharaoh's heart in Exodus. The book has an appendix that reviews the consensus of the early church on the issue of free will. They argue that determinism in a Christian context was an invention of Augustine.

Why I'm Not A Calvinist (by Jerry Walls and Joseph Dongell). The authors' goal is to explain why Calvinism is not a scriptural system. If you are looking to "disprove" Calvinism, this work is well worth the read. It is written at a layman / college level. As a side note, one of the authors has a free mp3 presentation that is in large part based on the contents of the book. It can be found here: Calvinism and the Wesleyan Message, Jerry Walls

The Wesley Study Bible (edited by Joel B. Green and William H. Willimon). The study bible is a collaborative effort from top notch scholars in the wider Methodist and Wesleyan community. The translation used is the NRSV. The best price I've seen online is Cokesbury.com.

Chosen but Free (by Norman Geisler) Geisler presents a number of interesting stories and parables that vividly explain the problems with Calvinism. The author does not consider himself Arminian. He refers to himself as a "moderate Calvinist". He in effect tries to split the middle between Arminian and Calvinist theology. Written at a high school level.

The Five Points of Calvinism, by George Bryson