write the book on

wrote the book on (something)

To be well known for being extremely experienced in or knowledgeable about something; to be renowned as an expert in something; to know nearly everything about something. The phrase has become so clichéd that it is often used after the word "literally" to describe someone who has actually written a book about a certain topic. This lady wrote the book on modern sound design, so I can't wait to work with her in the recording studio. He literally wrote the book on such trade wars, which was published shortly after his second term as president.
See also: book, on, wrote
Farlex Dictionary of Idioms.

write the book on

To be the preeminent practitioner of or expert in (something).
See also: book, on, write
American Heritage® Dictionary of the English Language, Fifth Edition.
See also:
  • a crack at (someone or something)
  • a straw will show which way the wind blows
  • a/the feel of (something)
  • (I) wouldn't (do something) if I were you
  • all right
  • (you) wanna make something of it?
  • all for the best
  • a thing of the past
  • a slew of (something)
  • a bird in the hand