The phrase "knew like a book" is an idiomatic expression that suggests having an extremely deep understanding or familiarity with something or someone. It implies having extensive knowledge, insight, and intuition in comprehending a particular situation, topic, or individual, similar to how one might know the contents, details, and twists of a book they have read thoroughly.
When someone "knows like a book," it indicates an exceptional level of awareness and understanding that goes beyond mere acquaintance. It implies being able to predict actions, reactions, and outcomes accurately, as if one had perused every page, absorbed every line, and memorized every character of a book. This familiarity may be the result of having devoted significant time, effort, and attention to learning about the subject or individual.
The phrase can be used in various contexts, whether referring to knowing someone's behavior, patterns, or intentions, or comprehending a complex topic, situation, or system inside out. It signifies a high level of expertise, proficiency, and comprehension that grants an individual the ability to anticipate and navigate with ease.
In essence, "knew like a book" encapsulates the idea of having an extraordinary depth of knowledge and understanding that grants one a sense of control, competence, and mastery over a subject or person.
