Experimental typography book

Hi everyone,

I’m doing some research starting from The Bald Soprano, composed by Robert Massin, which is one of my all-time favorite typography books.

I’m interested in studying experimental typographic books that use different typefaces to create distinct voices within the narrative. Do you know of other titles, studies, or projects that explore or push the limits of this approach?

For example, in theatrical texts, beyond the different actors’ voices, there are also asides, often set in italics, or the author’s stage directions.

I’d love to hear your thoughts or any suggestions you might have.