Kallen has written more than 350 nonfiction books for children and young adults. His books have covered a wide arc of human history, culture, and science. Kallen is also an accomplished singer-songwriter and guitarist in San Diego, California
I mean, if you like dogs, this will tell you about dogs. Specifically, it will tell you about cocker spaniels (and springer spaniels), and you will learn about their wavy feathered fur and their floppy ears.