Another book I've relied on for years, is a book called 'Make a Mix'. I don't use it so much these days, but it was sure valuable when my kids were little and my 9 to 5 years.
The recipes are all 'master mixes', with numerous recipes with which to use them. Breads, muffins, pancakes (a few things made from one 'master mix'). Drink mixes, soup mixes, seasoning mixes for all kinds of things.
Many of the recipes from the mixes are less than 5 minutes prep time
The only thing I still use out of that book is the granola recipe. BEST granola, bar NONE. 4 or 5 bucks for a teeny box.....I don't think so.
I invested in some great, really large glass containers for the mixes.