I use a USB CD drive on my computer, but I don't believe you will be able to plug it directly into the USB port on your truck. Well, you can plug it in, but it won't do anything. It requires drivers and software to play.
My wife is legally blind, and lives off of audiobooks. I used the computer's built-in software to convert all her existing CDs to MP3 files. Your computer will just look at them as any audio or music CD. I then loaded them all on an iPod, I think 128GB. Plenty of room. She also uses a lot of audiobooks from the library, probably 3 or 4 a week. They are all loaded over the internet directly to the iPod. I can either keep the files on the iPod, or delete them. Since there's plenty of room I just keep the files on there. They expire in 3 weeks, but she frequently checks the books out again months later to listen to again and they don't need to be downloaded again, they are just activated for another 3-week period.
The iPod uses the same OS as an iPhone, so it can connect to your truck through bluetooth or a a USB cable and play through your truck's audio system. (She normally just listens with her earbuds since we have different tastes.)
I also have a lot of old time radio broadcasts loaded on her iPod. About 500 Gunsmoke, all of the CBS Radio Mystery Theater, various others she likes, mostly westerns like Hopalong Cassidy, all episodes of Jimmy Stewart in the Shooter, etc. It works for us, and she never runs out of stuff to listen to.