I looove Audible. Some of my recent favourites:
THE GIRL WITH ALL THE GIFTS (horror with a very subtle, almost literary zombie theme, amazing narration)
THE FIFTH SEASON (super-diverse apocalyptic fantasy with the best accents and gender-switches in a single narrator that I've ever heard)
SPECTACLES by Sue Perkins (British comedy memoir by a famous British comedian, contains some sad sections for dog lovers
)
It is a bit pricy, I'm actually checking out my library's service right now to see how it compares. But Audible do a daily deal, where they e-mail you a book daily that's down to £1.99, and I've got a good amount of cheap reads from that. They also have a 'Kindle Matchmaker' service that offers massive discounts on Kindle books already in your library, which is fantastic if you have an out of control TBR pile like me.
(I'd link to the daily deal and matchmaker service but it's regional, best to just google 'kindle matchmaker us'/'audible daily deal us' etc.)
EDIT: Just checked out Oneclickdigital, our local audiobook library service, and honestly it's a huge disappointment. Tiny range of SFF, no YA section of its own, and they only have one book in a series. I feel sorry for patrons who have to navigate the site, it's really poorly designed and would be a waking nightmare for any visually-impaired audiobook readers, or non-technical library patrons, who might visit. Really disappointing.