[agoldenbear]

Another error, or so it would seem, is on p.171 in Problem 4-10.

After your flop bet gets raised, Harrington tells you what factors you should consider. Under "your opponents" he rules out a made straight from their possible holdings because "...someone would need to be holding ace-deuce, seven-six, or six-deuce, all unlikely hands to be playing before the flop."

I agree that A-2 and 6-2 are both trash hands that shouldn't generally be played, but seeing as everyone limped preflop, A-2 and surely 7-6 cannot be ruled out. 7-6 suited is a very likely candidate given the action up to this point, so why Harrington would discount it here, when it is precisely what your opponent ultimately shows down, is beyond me.