When I got married, I learned to cook with Good Housekeeping, Khalid Aziz's Indian Cooking, Madhur Jaffrey's An Invitation to Indian Cookery and something by Marguerite Patten - I have forgotten the title, but it was very useful. Good Housekeeping and Madhur's book, which was a paperback, eventually fell to bits. I replaced them with modern versions, which weren't so good.
I have masses of cookery books but I must admit to browsing many of the recipes rather than cooking them. My most used books are by Nigella. On the whole, her recipes work, which isn't true of all writers. Tessa Kiros is an example. She writes beautiful cookery books, like Falling Cloudberries, but some of her recipes just don't seem to work. Nigel Slater, on the other hand, is usually reliable and so is Jamie Oliver.
However, I follow Delia's instructions every year when cooking the Christmas turkey.