I always refer back to good old Delia Smiths Complete Cookery Course first published way back in 1978 in spite of having shelves full of cookbooks.
For basic baking,cakes ,pastry etc I have a very dog eared Bero Home recipes book that belonged to my mother and all the ingredients in the recipes did not exceed ten shillings including eggs at 3/6 a dozen !
The only up to date one I refer to is Nigel Slaters Real Cooking which is an excellent book with drool making pictures and lots of lovely recipes for leftovers !