I've just taken delivery of a copy of "The Drilling", as far as I can tell the only current book on the topic. I wanted to buy it in the original German, but the few I could find were priced at around €250, with which I could have a fine stalking trip. However it's easily available in English, printed in vast quantities for the insatiable US market I should imagine.
Anyway, hours, or indeed years of reading, research and preparation for the big event now lie ahead. Fantastic.