every trick in the book

referring to every possible method or strategy to achieve a goal, even if they are deceitful or unethical

The idiom "every trick in the book" likely originates from the idea of using all known or conceivable strategies, techniques, or methods, including those found in rule books, guides, or manuals, to achieve a particular objective. This phrase has been in use for a long time and is typically used to emphasize the exhaustive nature of the efforts taken to accomplish a task, often with a hint of resourcefulness or cunning.

In the face of a tough negotiation, the skilled diplomat was prepared to use every trick in the book to secure a favorable agreement.
When it comes to winning a debate, she knows every single trick in the book, from persuasive rhetoric to well-timed humor.
The con artist used every trick in the book to deceive his victims and swindle them out of their money.
The coach employed every trick in the book to motivate the team and lead them to victory.
She was determined to succeed in the high-stakes job interview, so she applied every trick in the book to make a lasting impression on the interviewers.