This is a very readable, even affable, introduction to Kierkegaard, that may be serviceable to many. It covers a large number of themes and does them a good deal of justice for such a short book. Someone who reads it will have a broad acquaintance with the main ideas and themes in Kierkegaard's work and a good sense of the main parts of his life.
Yet, I think Caputo botches the main idea, and this bothers me and makes me hesitate to offer it to new readers. If Kierkegaard weren't so hard to interpret properly, I would give this just three stars, yet it would be a bad practice to do this for every book with which you disagree on a very difficult point of interpretation. In particular he does not interpret Kierkegaard's conception of infinite passion or of the Knight of the Faith properly; the former is given little attention, and the latter distorted. I agree with him that something goes wrong very early on in his conception of faith, but whereas he points to the idea that God can annul morality as the first sign of this problem, this strikes me as a problematic interpretation of Fear and Trembling, as it fails to view it through the lens of the Kierkegaard-Regina relationship, which Kierkegaard asserted was essential for understanding him. In a journal entry Kierkegaard wrote,
On the whole, the very mark of my genius is that Governance broadens and radicalizes whatever concerns me personally. I remember what a pseudonymous writer (Climacus) said about Socrates: "...his whole life was personal preoccupation with himself, and then Governance comes and adds world-historical significance to it."... I was thinking particularly of *my* reader, for this book contained a little hint to her, and until later it was for me very true personally that I sought only one single reader. Gradually this thought was taken over. But here again Governance's part is so infinite.
The key is to learn to understand the importance of the relationship with Regina to Kierkegaard and how to treat this, not psychoanalytically, but as the very ingredient of his genius and the lens through which his intellect could focus and acquire its genius. This is not an easy task, but it is the essential one, and its lack here makes me a bit unhappy with this otherwise very nice introduction to the melancholy Dane.