If you’re interested in narrating audiobooks, you should definitely think about submitting an audition for the ACX (@acx_com) open casting call for Audible Books (@audible_com).
There are 2 separate scripts, one for males and one for females, and your audition will be listened to by the good folks at Audible! The winner gets a contract to record the audiobook with Audible handling the post-production.
And hey, even if you don’t win, you get exposure at Audible, which is pretty cool! Maybe they’ll like your voice for some other project they’ve got going on!