Million Dollar Blackjack
Fundamentals of Blackjack
Blackjack in the Zone
Blackjack Blueprint
Blackjack Wisdom
Las Vegas Blackjack Diary - Stuart Perry
Smart Cards
Shuffle Trak
and more...
These are all good books and software that aren't found in the bj21 catalog. Some of them are superlative in their orientation.
The good books are also sold at GBC,RGE and BJRnet, which all have a variety. Also, if you go to RGE or BJRnet, you can be sure that they won't sell crap, unlike GBC, who not only sell crap, but publish crap.