I read The Secrets of Unicorn Companies: Software Development and Work Culture Learned from Spotify.
You can learn about the organizational theory and culture of unicorn companies.
As mentioned in the afterword by the author, unicorn companies do not practice Scrum. How one interprets this may change the overall impression of the book.
Personally, I view it as a perspective that has transcended Scrum, reaching the stage of "ri" in the concept of "shuhari." However, I believe the main theme (the secret) of this book is to explore what kind of culture and qualities support growth, regardless of the methodology used.