Another audiobook resource is Librivox. Try it out!
So what is Audiobook Sync? It's a free service offered for summer reading that allows two YA audio book downloads each week. The selections are paired by a weekly theme and usually feature one recently-released YA title and one "classic" title. The audio books are full-length, high quality downloads, so they are the real deal. This service will resume in the spring of 2021.
You need to download the free Over Drive app (if you don't have it already) to listen. If you are living or traveling outside the USA, you will need a USA VPN to access most of the titles.