lol 'please note that you DO NOT have resale rights or GIVE AWAY RIGHTS to this book' (not that i mind about it but hey, you never know whos watching).
I highly doubt it would happen. These guides are nice, but no where near class action level. Only Kopp's and Joana's are worth that. Since they are making quite a bit of cash, they're in a position to sue, while these guys don't update their sites much, and shrug and think. "well, if I make some money that's cool, if not w/e.."