This is going to sound real bad but you know what, I couldnt care less.
I have about 50 Amiga books in all (inc service manuals and the like) but I have just as many downloaded (not the Amiga Guru book, not been that interested in it) but lets face it, its a bloody old book and imho there is no harm in uploading copies. (most of the books I downloaded were not torrents by the way)
Now if someone uploads your revised book then I think thats very wrong (although there is something to be said for you selling PDF versions, even of Amiga Future) but 20 years down the line if you found it on the net would you care?
Oh well thats two rants on one page. :-/