I didn't say that Harringtons older books are worthless. The fundamentals are still there. But look though the examples and tell me that there aren't things in there that just wouldn't happen today that way.
There's a reason why he wrote an updated version. He even states it himself in the foreword of the updated version (Harrington on Modern Tournament Poker ) that
Quote:
"the fundamentals are still the same but the tactics have changed"
(sorry if the quote is not exact. Had to retranslate from the german translation)