Well then you're pretty much screwed either way.
You have 3 choices:
1) learn german
2) do as I suggested with google translate. I guess you could translate/copy the index or directory page first, and then only translate/copy the information you need. But either way, you still have a fair bit of work ahead of you.
3) find someone who reads german and have him copy it down
Past that, you really don't have any real options for getting the information out of those books.