Yes, it's all in German. You can actually figure out how to read the book with just a little bit of effort. Get a German-English dictionary, or use the internet...the book is basically a chronological list of the folks that lived in Schrocken, so there are only a couple dozen words that you have to really learn.
I found it for sale here:
http://www.lehmanns.de/shop/schulbuch-lexikon-woerterbuch/85...Good luck.