Is there any kind of device that will allow my mom to read books?

Yes, this is such a bummer! I hope I am never in your mother's position.

I believe that the Library of Congress has audio book devices that are very easy to operate and that they loan out. Not only books but magazines and newspapers may be accessed. I haven't looked into that for many years, but I suggest it as a resource that might be worth exploring.

Books on a screen, such as Kindle or Nook or an iPad, etc. do not require turning pages. They might need someone to set them up and get Mom to a good starting point, but possibly she could manipulate the pages from there.

I can understand how important this is to her quality of life, and it is worth working on!

vision aid machines . one common brand is " aladdin " . i have one id sell reasonably but i suspect shipping would cost a lot . they weigh about 60 lbs - tv monitor and all . i live in central indiana . if you live close enough you might be interested .
if not , they can be found at stores called " low vision store " .

Have you spoken to her speech therapist and/or OT about this issue? There are a lot of issues that arise when a stroke damages the brain and getting back to usual activities like reading can be difficult, and NOT because of the lack of use of the dominant hand.

Is it possible that mom is having some visual field problems, comprehension problems, difficulties with procedural skills (what order to do things in?) I had a friend whose dad couldn't read the way he used to because of a very subtle visual processing issue that caused him not to be able to tell where the end of the line of print was (we solved that by having him put a Post It note at the end of the line.

Talk to mom's therapists about this and you may uncover some issues and some solutions.

Her vision is actually just fine. She can read even small type. It's her hand that's the problem. She needs to learn how to use her right (non-dominant) hand to flip pages somehow. I will talk to the OT about it. With work, I have to believe she can do that. I hope so. (I remember when I worked as a waitress a long time ago, there was a regular customer who had no arms. He used his feet to use utensils. It was amazing! He actually twirled spaghetti on a fork.)