go by the book

Meaning

To 'go by the book' means to follow rules, instructions, or official procedures very strictly without making any exceptions. It is used in both personal and professional contexts to describe someone who values order and compliance. The tone is neutral, but can sometimes imply that someone is being too rigid.

Examples

• Our new manager likes to go by the book, so make sure you log every single expense.

  Our new manager likes to go by the book, so make sure you log every single expense.

• If we don't go by the book during the audit, we could face some heavy fines.

  If we don't go by the book during the audit, we could face some heavy fines.

• He decided to go by the book and report the minor safety violation to HR.

  He decided to go by the book and report the minor safety violation to HR.

• You can't always go by the book when dealing with creative problem-solving.

  You can't always go by the book when dealing with creative problem-solving.

• The police officer went strictly by the book during the entire investigation.

  The police officer went strictly by the book during the entire investigation.

Common Mistakes

• ✗ In this company, we always go by a book.

  ✓ In this company, we always go by the book.

  The idiom uses the definite article 'the book' to refer to the metaphorical set of rules.

• ✗ He is a very strict person; he always goes with the book.

  ✓ He is a very strict person; he always goes by the book.

  The correct preposition to use here is 'by,' not 'with' or 'through'.

Related Expressions

Practice

• She is a very strict inspector who always insists on going ___.

  💡 following rules exactly

  Show answer

  by the book

• Sometimes you have to bend the rules a little instead of going ___.

  💡 acting strictly according to regulations

  Show answer

  by the book