These books have lots of recipes for sandwiches, soups, muffins, cookies and crackers made from whole foods. There are also great breakfast recipes that can be used in lunches like pancake mix, French toast, muesli, and scrambled tofu.
Feeding the Whole Family by Cynthia Lair
Lair has tons of whole foods recipes and a great section on packing lunches.
Vegan Lunch Box and Vegan Lunch Box Around the World by Jennifer McCann
These books, by the creator of Vegan Lunch Box Blog, have innovative and delicious ideas for the lunch box (though most take quite a bit of prep). All the recipes are delicious and very well tested.
The Vegetarian Family Cookbook by Nava Atlas
This is a great all around cookbook. The book includes a section on sandwiches, wraps, and school lunches.
Vegan Deli by Joanne Stepaniak
This book is full of salads and soups – perfect for the lunchbox or picnic.