Wayne Grudem has provided his Systematic Theology: an enormous (1291 pages) and apparently popular (the cover of one recent printing claims sales of over 1/4 million) tome. Chapter 27 (pp. 568-607 in what appears to be the 2000 printing) addresses the topic of the atonement. Much of the material serves as a helpful general introduction to the atonement from a broadly Calvinistic perspective. There are a number of helpful explanations in the chapter that are geared toward frequently asked contemporary questions, such as the question "did Christ endure eternal suffering."
There were also, however, a few disappointments with the chapter. Pages 582-94 include a very lengthy discussion of the credal phrase "he descended into hell." While this may be an important discussion, it seemed out of place at least as to the proportion of emphasis in the chapter. Grudem's discussion is quite detailed and provides an uncharacteristically (for Grudem on the atonement) deep look into history. Although it was quite detailed, I think I still prefer the explanation provided by Danny Hyde, which I discussed previously (link).
The chapter was especially weak in its defense of particular redemption, also called "limited atonement." The exegetical analysis of the passages relied upon by Amyraldians and Arminians seemed cursory at best, and omitted some of the best explanations of the sense of those passages. Furthermore, while little space was devoted to establishing the doctrine from Scripture many times more space was devoted to accommodating those who disagree with this doctrine.
Especially disappointing was Grudem's naive assertion that "It seems to be a mistake to state the question [of the extent of the atonement] as Berkhof does and focus on the purpose of the Father and the Son, rather than on what actually happened in the atonement." What actually happened, after all, depends largely on the intent and purpose of the Father and the Son.
In his ecumenical efforts, Grudem ends up providing a number of confused statements regarding characterizations of the atonement, such as affirming that it is proper to say that "Christ died to bring the free offer of the gospel to all people" or "Christ died to make salvation available to all people." The problem with these statements becomes clear when we realize that Grudem's statements are statements about the purpose and intent of the atonement (and statements that get that purpose and intent wrong, at least formally), rather than about what the atonement actually did.
The above criticism should not be taken as suggesting that Grudem is an Amyraldian. He is insistent that the atonement only paid for the sins of the elect. Nevertheless, his chapter contains a number of significant weaknesses, which prevent it from receiving the highest praise. Lest we end on a sour note, it should be observed that Grudem provides an interesting (if somewhat incomplete) bibliography at the end of the chapter, as he does at the end of many (perhaps all) of the chapters of his Systematic Theology. All in all, it is a good introduction to the topic, but you can get a more accurate and more detailed explanation in a number of the books to which Grudem refers his readers.