A Salute to Cooking (Cook Book) - A really unusual cook book and one with such charm and variety that I just wouldn't be without it now. And of course it has a spectacularly good recipe from my father.
Complete Cookery Course: Classic Edition - Delia Smith - feels a bit of a cop out putting this but it's just great to refer to if you want to go it on your own but want a saftey net. It literally has everything... well not everything but as near as damnit.
Nigella Express - Nigella Lawson - again not very trendy but actually I find this great for dinner party puddings. I now always have her pomegranate ice cream in the freezer and the ice cream cake is fantastic.