The Chicago Manual of Style,

Every chapter has been reexamined with diversity and accessibility in mind, and major changes include updated and expanded coverage of pronoun use and inclusive language, revised guidelines on capitalization, a broader range of examples, new coverage of Indigenous languages, and expanded advice on making publications accessible to people with disabilities. The Manual’s traditional focus on nonfiction has been expanded to include fiction and other creative genres in coverage of topics such as punctuation and dialogue, and the needs of self-published authors receive wider attention.

The citation chapters have been thoroughly reorganized for the benefit of new and experienced users alike, and the key concepts for editing mathematics have been integrated into the chapters where they will be most useful to generalists. Evolving technologies―from open-access publishing models to AI―are covered throughout. And naturally, there are some well-considered updates to familiar rules, including changes intended to align the Manual’s recommendations more closely with real-world usage.

Have to say: We/I never realised how uneducated in grammar and style we/I have been until reading this book.
A must have for all [critical thinkers].