I love audio books. Neither cats nor little boys and stop you listening in the same way that they can stop you reading. In fact you can build a wicked train track or have a cat sit on your lap and your learning is not stopped. I am currently working my way through the Great Courses The American West audiobook which is far more extensive than I first thought. The tutor is excellent, thoughtful and pack in loads of interesting facts without overloading nor disrupting the narrative.
If your studying the American West for GCE or just have an interest but not the time to read then I recommend Great Courses.