I had Tyler Florences last cookbook and gave it away. I also had Elie Kriegers cookbook and gave it to my husbands friend. I have two of Giada's books and they are ok but they are definitely American Italian recipes. They are her American interpertation of authentic Italian recipes. I have a lot of Paula Deens books which are all good. I have two of her sons cookbooks which are good books. I have a couple of Rachael Rays cookbooks. I highly reccomend her comfort foods cookbook. It is small but packed full of yummy recipes. I have Nigella Express. It is a good cookbook. I have one Jamie Oliver's cookbook called Jamie's Italy.
Like Nan said go to Amazon and type in a type of cuisine that interest you and see what pops up. I have gotten some great deals on like new used books from there for as little as .25 each.