Bluskov published different books, one of them is a booklet. That one I bought, and yes it is in paper. I think that the biggest wheel in it is with 15 numbers.
As far as I know he doesn't discuss number selection, but I think to have read or heard that he has his own ideas. Maybe he got approached by some publisher to sell a mini version of his bigger books and I think that it is okay as most people don't want to play too big wheels and the bigger the wheel is, the smaller the payout guarantee is for your selected numbers. The denser the wheel, the higher the guarantee.
If you want to filter a wheel, I suggest using 5 if 5 for pick 6 or even a 6 if 6, full wheel. WG might sand it down, I have never seen WG in action, so I can only read the description.
A wheel should pay, that means if you play around 18 numbers for a pick 6 game, you should be reasonably sure to get 5/18 correct. People often think that they will win big by playing 25 numbers or even more. I don't think so, unless you catch 6/25 every drawing and eventually you get a big payout once a year at least. A full wheel is the only wheel with a guarantee that a number selection in any formation will pay the maximum. Sure of one number, then choose a key wheel and put that number in every combination. No need to argue, if the number comes up, you want it once in every line! If your filter is half odd and half even numbers for every line, then you should be able to create such a wheel, or by filtering, or by prefiltering. You can probably invent as many wheels as you can come up with idea's.
I don't have any simplistic version of a GH book.