Trevor Corson will read from The Zen of Fish: The Story of Sushi, from Samurai to Supermarket at Harvard Book Store, tomorrow, Wednesday, June 13, at 6:30 pm. Trevor Corson couldn't have timed the arrival of The Zen of Sushi any better, at least where Boston is concerned. With the arrival of Daisuke Matsuzaka, Hideki "Hero in the Dark" Okajima, and their media entourage, Bostonians who previously eschewed sushi might be giving the raw-fish treat......