I enjoyed the book a great deal and found it instructive. As others have mentioned, it is written in a way that maintains respect for Arminians as fellow Christians while still disagreeing with them. Quite refreshing!
My one complaint is that I find it a bit misleading that the book is presented as DRM free. While this turns out to be the case, I was required to Adobe Digital Editions. A bit of a hassle, but no big deal. The file, however, was downloaded as a string of numbers and letters having nothing whatsoever to do with the name of the book itself. Thankfully, I was able to track down which file it was and convert it to use on my Kindle. The technical hurdles make the DRM-free nature of this e-book practically non-existent for many people, I think.
I think this is one of the better starter works on Calvinism and Reformed Theology, but I think people should know that the book was already written with another title, before the publisher saw fit to change the title to cross with "Why I Am Not A Calvinist", which has a more engaged tone. So just remember that when reading this fine book.
In this book, Williams and Peterson do an incredible job of presenting their perspective on Calvinism. They are very gracious in their treatment of Arminianism and refer to them as brothers, rather than heretics - which sadly is too often the case. Even if you are not a Calvinist, this book is worth reading to get an accurate portrayal of where Calvinists are coming from.
I was an Arminian at first, and was very biased against Calvinism. But that was because I was very stupid and ignorant of Scripture. By God's grace, after painstakingly examining both sides of the issue, I saw that Calvinism is really the accurate expression of what Scripture teaches, and that Arminianism is an anti-Christian heresy. I recommend this book as an introduction, but I encourage people to read more on the subject. For several superb works on Calvinism, I recommend the following. Search for them on the web (many free materials are available from these authors).Gordon Clark (Trinity Foundation):- Biblical Predestination- God and EvilVincent Cheung (Reformation Ministries International):- Systematic Theology- Ultimate Questions- Presuppositional Confrontations