DD, who is the main baker in the house, likes a variety. She would add Lorraine Pascale to Mary. She hasn't really taken to Delia, but then I don't think she has really seen her.
Her fav is one of her 'kids' cookery books, even though she is actually a very good baker. Her reasoning is that it has simple recipes that always work but give plenty of ideas on how to ring the changes with the recipe. At the moment I can't find it though, but she thinks it is 'simple sweet treats'.
Her biggest problem has been that everyone knows she likes baking, so they buy her baking books, but always kids ones.
when she sort of grew out of that a number of years beforehand. One friend realised once we got to the point that DD always made the dessert if we ever went over to theirs, and that her ability and taste was a bit more sophisticated than that.
Over the years we have cut out recipes from mags and printed them from the electrical INterweb and stuck them into a notebook. DD has now taken over ownership of the book, added to it, indexed it etc.