Actually, this book is only cited by an emperor with a good memory who appears in this text. I don’t think you will find what you are looking for in that text.
If you want novels that mention Bruno you can search:
Novels:
Aegypt by john crowley is the most obvious and is based on bruno and his esotericism and philosophy.
S.J. Parris and his series based on Bruno: Heresy, Prophecy, Sacrilege, etc.
Funes the Memorious by Jorge Luis Borges.
Texts that study and explain Bruno’s works:
Nuccio ordine most of his books in Italian, but you can find one or another book in English like “Giordano Bruno and the Philosophy of the Ass” he also has another one in Spanish that might interest you a lot that is based on Bruno’s literature, philosophy and painting “EL UMBRAL DE LA SOMBRA LITERATURA, FILOSOFÍA Y PINTURA EN GIORDANO BRUNO”.
Fabio Ferrucci in Italian studies and explains the art of Bruno in a clearer way based on de umbris idearum.
Mnemotechnics The Art and Science of Memory Techniques (M A Kohain), this text talks about memory verborum based on bruno’s techniques in de umbris and image composition and other things like creating an index of loose places to jump to using a unique place to hang pictures with frames on the wall, haha, I found this book by mistake.
There are a lot of authors who were inspired, studied and studied Bruno, but it is a long list.
I have many of those books, all books based on philosophy, history, mathematics, geometry, architecture, astrology and astronomy, encyclopedias, symbolism, art, etc… hahaha, they are of my interest, I love how these characters adapted sciences and works to their own methods.
Bruno used a style of writing in vulgar Latin and therefore difficult to understand for many readers today and that is why his mnemotechnical methods are criticized as inefficient or pedantic, but in reality many of the methods used today are based on Bruno’s inspiration.