The Complete Trail Food Cookbook: Over 300 Recipes for Campers, Canoeists and Backpackers is a title to check out as well. It came out this year. I picked it up recently (fair warning it has a different cover than Amazon shows!). They also authored a book just on dehydrating before.
Personally....if you want to learn all about dehydrating get a book on dehydrating - it will help more with times/heat settings and storage issues.
You don't need a book of recipes to make and dry - you can dry most anything. But if you want to use dried ingredients and make recipes, then yes, start looking at books.