the book
noun
US, informal
1
: the knowledge or information that relates to a particular subject, person, etc.
The book on him is that he can't hit a curveball.
2
: a book that lists the names, addresses, and phone numbers of the people and businesses in a certain area : telephone book
Give me a call if you need to. I'm in the book.
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Merriam-Webster unabridged
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