She appreciated it when I would bring a book to her and say "here, I enjoyed this one. I think you'll like it, too." She agreed with me most of the time, and when she didn't, it just gave us something to talk about besides how bad her knees hurt.
Writing book reviews is a continuation of that. I enjoy giving self published authors a platform in which they can be seen in my newspaper column. I like helping their rankings and sales, hoping that somehow, someone else will return the favor, and help my books get some exposure and ranking, too.
But the real reason I do it is my mother. She's not the only one who can't get to a store. Some people are too busy with their jobs. Some people have disabilities. Some people have small children. I think of my reviews as a ministry to people who can't shop, helping them find a good book to make their life more enjoyable.
When my husband and I attended a retreat about our spiritual lives, we were told that everyone should have a ministry of some kind. We don't all have to be preachers or missionaries to serve God. All we need to do is perform some small act of kindness on a regular basis because it helps someone some how.
Perhaps writing book reviews can be your ministry as well. Help authors like me. Help people like my mother. And then go to sleep with a smile on your face because you did your good deed for the day.