I have too many cookbooks, but I keep buying more. I find funky vintage ones in thrift stores and at yard sales, and I buy new ones, too. They give me inpsiration, comfort and make me hungry, all at the same time.
The old editions of Joy of Cooking
How to Cook Everything, Mark Bittman
The Healthy Hedonist, Myra Kornfeld
The original Silver Palate Cookbook
The New York Times Cookbook, Craig Claiborne
The New Spanish Table, Anya von Bremzen
Sublime Vegetarian, Bill Jones
Delia Smith's Summer Collection
Delia Smith's Vegetarian Collection
the original Lighthearted Cookbook, Anne Lindsay
A Century of Canadian Home Cooking
Supercookery
and several "church lady" compilations courtesy of my mother, including a great old Blue Ribbon cookbook from the '30s