Russell & Audrey (my Mother's name!) Here are some videos that will help you add those doors!
Hello! Here are some great ideas for you. Good luck on your project! Best wishes for a wonderful holiday season.
As well as this link: https://homeguides.sfgate.com/add-doors-bookcases-40405.html
You could use some fancy hinges
Hello. Cindy here. You could use picture frames as doors on the front of your shelves. Just add hinges to the frames and handles/knobs. I've seen that done before. Good luck and Happy Holidays.
Everyone had some very helpful ideas. Loved the videos shared and the picture frame idea is awesome!