Heidegger and Christianity Book

Like many fields, philosophy consists of primary sources (Heidegger, Husserl, et al.) and secondary sources, scholars who comment on primary sources by providing criticism, analysis, extrapolation, etc. As one might expect, it's usually the primary sources who are the most interesting to read, who are the most worthwhile; secondary sources are usually a supplement, at best.

There are, however, a few curious exceptions, thinkers who technically do not write their 'own' philosophy but work entirely in the orbit/sphere of primary sources, and who are nonetheless precisely as brilliant as any of the more famous philosophers. In the late twentieth century, I think it basically comes down to (for continental philosophy) Robert Pippin and John Caputo. Demythologizing Heidegger is the best 'secondary' source about Heidegger yet published, I think; obviously a tiny bit outdated now that we have more of Heidegger's lectures to work with, but the brilliance of this book can hardly be overstated -- entire fields of Heidegger Studies can be traced back to these essays.