I'm always reading/listening to two books at once, one audio-book, and one in a visual format. A lot of technical or older books aren't available in any electro

I'm always reading/listening to two books at once, one audio-book, and one in a visual format. A lot of technical or older books aren't available in any electronic or audio format, and so I want to always be in the habit of reading visually so that I can accommodate those.