I find that sometimes certain music and books go together very well. But I can't listen to music with vocals while I read a book, it takes me out of the story. So it has to be instrumentals or ambient music without any vocals.
Yeah it has to be something without vocals, because I will start to listen to the lyrics and will take my mind off the book I'm reading. But music does add a lot, it just has to be without vocals and I'm good.
Music that has no lyrics, sure. I enjoy Lo-Fi and video game remixes for music. Sometimes I will put on classical music as well. It can help me better remember things while reading or digesting something. I learned this from a teacher when I was in school. Helps a lot!!