Reformation Theology has posted some excepts from J.I. Packer and O. R. Johnston’s introduction to Luther’s Bondage of the Will. The post is very brief considering the breadth of the topic discussed but I would encourage those who haven’t thought about these foundational truths to read through it and spend some time considering them. Also have a look at Edwards’ Freedom of the Will. I would have to say that Luther’s work, which Luther himself said was his greatest, is one of my “top ten” readings.

You can also find Luther’s work here and Edwards’ work here although these are the types of volumes that you want to pick up for yourself and have as a reference. But have a look through the other offerings from the Christian Classics Ethereal Library.