Hi Gene, I mentioned your book near to mine at my SMIRF / ChessBox pages:
http://www.chessbox.de/Compu/schachbuch.html . Unfortunately my German
language book on Chess960 is sold only rarely about 10 pieces per quarter.
So I hope for you to have better success with yours ... ;-)
Your book is enlighting a lot of details also on 'fights' about right or
wrong extended FEN and move representation for engines playing Chess960.
Meanwhile the unnecessarily invented Fritz numbering scheme for Fischer
Random Chess luckily has been withdrawn by an update of that program.
Regards, Reinhard.