I have a bit of an obsession for cookbooks, but these are the ones that I would want my kids to have on their book shelves before any others. I have listed them in no particular order.
Whole Foods for the Whole Family, La Leche League International Cookbook. Edited by Roberta Bishop Johnson (here it is).
The America’s Test Kitchen Family Cookbook, Heavy-Duty Revised Edition. America’s Test Kitchen (here is their web site).
Vij’s: Elegant and Inspired Indian Cuisine. Vikram Vij & Meeru Dhalwala
Arab Cooking on a Saskatchewan Homestead: Recipes and Recollections. Habeeb Salloum (more here)
The Joy of Cooking. I like to have the older, hard cover versions, as well as an up to date copy on hand; as of this writing, there are eight editions!
Cook book authors that I particularly like, and whose recipes seem to be particularly non-fail: Bonnie Stern, Martha Stewart, Ina Garten, Canadian Living, Mark Bittman, Tyler Florence.