For me it feels like relistening to an album I like.
Sometimes I relisten and it makes me feel different, sometimes it’s about scratching a familiar itch.
Sometimes I listen to the whole album, sometimes the single, sometimes the deep cuts.
Same with books. I’ll read favorites at different points in my life. I’ll read them for comfort. I’ll read the whole thing, skip around to highlights in the story, or read just a scene I’ve been thinking about
I don’t organically picture the characters or any scenery I read because I don’t have a visual imagination. Descriptions give me a vague impression, but that’s it.
That said, I will usually look up fan art to create a better picture of characters and settings.