This might sound weird to some people, but when I found out that Japanese adult video star Kaho Shibuya wrote a book about the industry and it actually got an English translation, I was genuinely excited.
While there is plenty of English language literature about the Western porn industry with its unique experiences, economy, and history, the Japanese one is an entirely different beast and insider information about it rarely leaves the local language. And Kaho Shibuya, having been a genuinely huge name in that business over the last decade as well as having been a professional journalist before that with a passion for writing that apparently still lives on, it was a perfect match.
And so, Shibuya's The Japanese Porn Industry Unmasked gives a really thorough and interesting account of all the different elements of that environment as well as personal anecdotes, which can be quite funny at times.

She talks about the marketing, the legal work, sex worker's rights in Japan, and the workplace culture on set... The hierarchies between different kinds of adult film actors, how people get into this line of work in the first place and what to look out for if one was actually interested in joining it, with very concrete data and advice.
But also how professionals make fake cum, how actresses (and actors) prepare their body for ridiculous sexual activities without harming themselves, and how the infamously aggressive censoring in Japanese adult media changes the production.

If this subject is something that interests you, then this might be a definitive read, at least when it comes to English language media. It's very informative, well-structured, and gives a very genuine point-of-view from a charming author who has experienced a lot of this world first-hand.