Listening to a book counts as having read it.
Listening while driving or working out can be distracting, so it's best if the narrator doesn't talk too much over music. If there's a lot of dialogue between characters, it may be difficult for someone who isn't used to listening closely enough: In this case, try turning off the music and just listening carefully!
Listening to a book may help you remember it better.
Here's how this works: Your eyes and ears take up different parts of your brain, so when they work together, they make it easier for your brain to retain new information. Listening helps stimulate more neurons which makes it easier for the synapses in these neurons to fire together as a group (instead of individually). When these synapses fire together repeatedly over time, this strengthens their connections with each other which allows them all to work better together in future tasks requiring memory recall or recognition.