[Niediam]

I would assume (key word here...) that it's because the maket for such a book is actually pretty small. The number of people who play 6max online can't be anywhere near the number of people who play full at casinos or in home games. In addition, how many of the people who mostly play 6max would actually buy the book? Of course us 2+2ers would but if you think about how terrible it seems most 6max players play I'd dare say that many (most?) of them don't actually work on their game.