One from the 'weird-places-to-spot-a-review' department ...
Mainly 28s, the "specialist 28mm wargames review site" has reviewed Hal Spacejock
And the second printing isn't even 28mm thick.
I think the highest praise I can give is that it reminds me of Douglas Adams rather than Terry Pratchett - it's more mature and not as "in-your-face" as Pratchett (who is one of my favourites). I really like Simon's style. The way the whole plot plays out reminds me of my past in sci-fi role-playing (Star Frontiers and that sort of thing) with its twists and Hal's vision of the universe and his place in it. I think that anyone reading Hal's adventures will see a little of themselves in him - I certainly did.
Simon Haynes is the author of the Hal Spacejock and Hal Junior series (Amazon / Smashwords / other formats)