You disregard or ignore established rules or conventions."In times of crisis, sometimes you have to throw the rulebook out of the window and be flexible."

In my opinion/according to my beliefs/as far as I'm concerned. "The government's doing an awful job, in my book."

A commonly used method to trick or deceive someone. “He told me that his dog ate his homework. That’s the oldest trick in the book.”

They will be held accountable or made face the consequences of their actions. "Those responsible for the fraud will be brought to book and prosecuted."

You carefully examine the details, especially the T&Cs of something. "Before signing a contract, it's essential to read the fine print to avoid surprises."

You can’t judge a person, experience, object, etc. just by what you see. “She doesn’t seem like she is the smartest, but you can’t judge a book by its cover.”

A surprising or unexpected event. "Well, that's a turn-up for the books - I never thought he'd get the job!"

You are a very open person who hides nothing from others. “I thought it would be hard to get information from him, but he was an open book.”

You alter facts or figures dishonestly or illegally. "Their accountant was charged with cooking the books, and now he's in jail."

Is a person who likes to read books. “She is such a bookworm! She seems to have a new book every day!”

Punishing someone or calling them to account for their behaviour. "Bringing him to book is the only option to make him understand his actions are wrong."

Having a lot of academic knowledge learned from books and studying, but not necessarily knowing much about people and living in the real world ("street smart").

You charge or punish them to the full extent of the law or regulations. "If caught, they'll throw the book at him for breaking into the secure facility."