audio books

I'm looking for alternative activities I can do while nursing my baby. At night she usually nurses endlessly until she falls asleep. I would usually end up just browsing facebook or playing candy crush saga. Sometimes I chat with friends too whenever I catch them online. Probably I can listen to books online for free. For sure I wouldn't be mindful of the time when I'm doing something else. Do you have any suggestions on what audio books I can listen to? Self help books are really great. Maybe there are mommy related audio books I can download.