Audiobook bundle offers scifi books
http://www.audiobookbundle.com/
3 Sci Fi Audio Books for just $4.99
8 Sci Fi Audio Books for just $19.99
I'm not that familiar with Sci Fi, there's one Ron Hubbard on 3Scifi list.
(If anyone found science audiobooks or The Great Courses have discount pls let me know it
)
Offer ends within 6 days btw.