The full title of this book is When Pigs Fly! Training Success with Impossible Dogs!
Elka is not an impossible dog. She's very smart and sometimes difficult and frustrating because of her intelligence (a combination of "What'll you give me for it?" and "I don't see the point", I'm sure.)
When Pigs Fly! uses clicker, treats, and basic notion of drives and motivations to make working with your dog the joy you hoped it would be.