Gets four stars for the explicating of several (popular) Lewis themes, theological and philosophical views, and arguments, in a more analytic, rigorous way than Lewis himself did. So, the book is good for those who might want to get a clearer picture on some of Lewis's views.
Here's the breakdown:
I. Truth
1. Lewis's Philosophy of Truth, Goodness and Beauty
Peter Kreeft
2. From Atheism to Deism: A Conversation Between Antony Flew and Gary Habermas
Gary Habermas and Antony Flew
3. Defending the Dangerous Idea: An Update
Victor Reppert
4. Aut Deus Aut Malus Homo: A Defense of C. S. Lewis's "Shocking Alternative"
David Horner
5. The Abolition of Man: C. S. Lewis's Prescience Concerning Things to Come
Jean Bethke-Elshtain
6. C. S. Lewis and Emotional Doubt: Insights from the Philosophy of Psychology
Gary Habermas
II. Goodness
7. Is Divine Iconoclast as Bad as Cosmic Sadist? Lewis Versus Beversluis
David Baggett
8. Pursuing Moral Goodness: C. S. Lewis's Understanding of Faith
Kevin Kinghorn
9. "Belief" in the Writings of C. S. Lewis
David Rozema
10. To Reign in Hell or to Serve in Heaven: C. S. Lewis on the Problem of Hell and Enjoyment of the Good
Matthew Lee
11. Lewis and the Necessity of Gratuitous Evil
Michael Peterson
III. Beauty
12. Evil and the Cosmic Dance: C. S. Lewis and Beauty's Place in Theodicy
Philip Tallon
13. Lewis's Miracles and Mathematical Elegance
Russell Howell
14. Beastly Metaphysics: The Beasts of Narnia and Lewis's Reclamation of the Medieval Metaphysics of Participation
Michael Muth
15. Lewis and Tolkien on the Power of the Imagination
Gregory Bassham
Objectively, the book was pretty bad (with a few exceptions, one being Reppert's essay on the argument from reason), especially when it waxed theological. At some points it got downright heretical (Kinghorn's essay had sanctification coming apart from and prior to justification, and gave "an account of faith that centers on the pursuit of good purposes rather than holding true beliefs"). The essays on goodness (covering the problem of evil and hell, 7, 10, and 11) were the best set of essays, though I staunchly disagreed with almost every point in them. Baggett's essay Is Divine Iconoclast as Bad as Cosmic Sadist had some good things to say, but ultimately settled for rationalism, claiming that there may be evils now that we cannot understand how they are used for good, or are goods, but ultimately we must be able to comprehend the answer (in heaven). Even though this is enough to undermine some contemporary objections to Calvinism (e.g., ones made to me many times by, ironically, one of the essayists, Victor Reppert), I do not agree that finite man must be able to comprehend the details of any God-justifying reason whatever. That just seems like an impossible burden to argue.
So, I wouldn't recommend this book for good theology, or good (not in a technical sense, however) philosophy (with the above caveats), but if you're looking for a more rigorous and analytic presentation (or, interpretation, in some cases) of (some of) C.S. Lewis's more popular themes, then this book will be of interest to you.