As of 9.00am this morning I discovered the following:
Pax Britannia: Dark Side is ranked 85,100 in Books.
Scottish Miscellany: Everything You Always Wanted to Know About Scotland the Brave is at #76 in Books > Reference > Fun Facts & Trivia > Trivia.
And Night of the Necromancer is 21,136 in Books.
Now I know that's not a Terry Pratchett style #1 placing, but it's quite good - isn't it? It's just a shame Amazon have it credited to the wrong Jonathan Green.