[kagame]

Even assuming that in this specific situation (agg player in position with a multiway pot) it is true checking the set is the most profitable play considering the hand in the vacuum:

1) check raising with a set increases the likelihood of having a huge problem where people know you check raise your monsters, thus if you want to make a credible bluff you will need to check raise bluff, which is obviously going to be very expensive when you do run into a hand

2) and will make your medium strength hands play HIGHLY transparently, check calling sucks and leading out when weak will get pots stolen from you constantly against good players

I am also very appreciative of the general discussion this is sparked, and I hope your book is completely misinterpreted by new players or ignored, and does not help anyone play better!