You can get a free pdf of Arthur W. Pink’s book The Sovereignty of God at monergism. It can be a little tricky to find the link, so here is the direct pdf link. Even though Pink’s writings are over 90 years old they are very readably. AW Pink was very gifted in clearly laying out his thoughts, which are both challenging and powerful. The Sovereignty of God as you would expect looks at God’s Sovereignty, as is very good for looking at some of the central differences between Calvinism and Arminianism.
You can also read the Sovereignty of God free online at Centre for Reformed Theology and Apologetics, CCEL or Providence Baptist Ministries
Thanks for posting this! I just noticed, though, that the link is invalid. Then I realized there is a backslash at the end of the link location that needs removed. :)
Hmm… even that doesn’t seem to be working. I guess I’ll just go to CCEL. Thanks!