I added the 500th book to my collection at LibraryThing.com today. Check it out here.
So what was the 500th book? Finally, after several years of searching, I finally found this book for a decent price through Germany's Amazon.de site:
Matthias Konradt. 1998. Christliche Existenz nach dem Jakobusbrief: Eine Studie zu seiner soteriologischen und ethischen Konzeption. Vandenhoeck & Ruprecht. 406 pp.
The translated title is "Christian existence according to the Letter of James: A study in its soteriological and ethical conception."
From what I have read, my understanding of James seems closest to that of Matthias Konradt, so I'm looking forward to reading this, and improving my German at the same time.