i was running that swordfishing boat the last six years that i swordfished and because of the book -- people always ask you how did the perfect storm change your life? the weather event didn't really change my life a great deal but the book by sebastian junger changed my life from fishing to writing. i started, because of the very generous portrayal of me in that book, started getting a lot of attention from the media and got some attention from publishers. brian: what year did the -- did you start the writing thing then? linda: it took me one year to write my first book. so i started in 1998 and finished in 1999. brian: now when we record this -- we're reporting this in august, your book is number two on the new york bestseller's list. do you ever expect that linda: no. i've been so surprised and thrilled that this has happened. brian: why do you think this is happening? linda: i have a theory that i think people are really generally interested in reading nonfiction written by someone who has done what they're talking about. because i -- so many people coming up to me signing the boo

and rather than swordfish, mako shark.farm-raised for wild-caught is the other common form of fish fraud. there is one test you can do at home. you see, wild-caught salmon maintain their color during cooking. bru farm-raised salmon fade during cooking because they're fed red pelets to give them their color. >> the environmental group ocean says fish fakery is a health issue. the farm-raised salmon can contain more fat and antibiotics. and some tropical fish carry a devastating neurological disease. >> american consumers would be outraged if they ordered roast beef and they got horse meat or god forbid, whale meat. they should be outraged if they order snapper and they get tilapia or some endangered species. >> reporter: the group wants the fda to require fish to be tagged, track and then tested. elisabeth leamy, abc news, washington. >> thank you, elisabeth. >>> when we come back tonight, the key secret to improving your life right now. oprah knows it, dr. oz does, too. diane has spent so much time with the doctor over the