Related: I have definitely lost my once lifelong habit of reading at least a book a week. It's down to about a book a year. Reading was such a big part of who I am and yet I now struggle to read a book. I keep buying them, however, I suppose in the hopes I can convince (shame?) myself to read by sheer volume of what I have bought and haven't read.
Set time aside: for example when eating breakfast, or before bed. Use a timer, set it to at least 20 minutes. Each minute you read per day, equals about 1 book per year. So if you read 20 minutes per day, you will read 20 books per year.
