9-12 months is (typically, no.child is the same!) a period of imitation and observation by the baby. So even if you are in the car, keep talking, tell stories, make rhymes of things you see, sing a song, etc. Your daughter will be more excited to try talking and picking up words (or making her own nonsense words)
Books, arent just for reading, and hearing words. Just opening and closing them ans turning pages are developing motor skills.
Also a great time to work on pretend play (figurines, stuffed animals, toys) as well as stories and chatting. A lot of studies by the US NIH are pointing that even just a 30 minute session of pretend play with a parent per day is going to help excel with development.
These are the US Govt - National Institute of Health recommendations for 9-12 month development play.
Provide picture books.
Provide different stimuli by going to the mall to see people, or to the zoo to see animals.
Build vocabulary by reading and naming people and objects in the environment.
Teach hot and cold through play.
Provide large toys that can be pushed to encourage walking.
Sing songs together.
Avoid television time until age 2.
Try using a transition object to help decrease separation anxiety.