"know like a book" meaning in English

{
  "forms": [
    {
      "form": "knows like a book",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "knowing like a book",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "knew like a book",
      "tags": [
        "past"
      ]
    },
    {
      "form": "known like a book",
      "tags": [
        "participle",
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "know<,,knew,known> like a book"
      },
      "expansion": "know like a book (third-person singular simple present knows like a book, present participle knowing like a book, simple past knew like a book, past participle known like a book)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English similes",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1851, T. S. Arthur, “That John Mason”, in Off-Hand Sketches",
          "text": "\"He's a bad man, that John Mason, and my advice to you and to every one, is to keep clear of him. I know him like a book.\"",
          "type": "quotation"
        },
        {
          "ref": "1939 June 21, “Slayer Still Free in Woods”, in Leader Post, Saskatchewan, Canada, retrieved 2013-11-18, page 9",
          "text": "Olson can hide out around here until the snow flies if he wants to. He knows these woods—every steam and lake—like a book.",
          "type": "quotation"
        },
        {
          "ref": "1998 March 22, Dave Anderson, “College Basketball: When Sherman White Threw It All Away”, in New York Times, retrieved 2013-11-18",
          "text": "I played with the guy seven days a week; I knew him like a book.",
          "type": "quotation"
        },
        {
          "ref": "2010, Bill Ratcliffe, Liz, page 24",
          "text": "Around here I know the shoreline like a book.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "To have an extensive and penetrating understanding of (something or someone)."
      ],
      "id": "en-know_like_a_book-en-verb-0d41t0Gw",
      "links": [
        [
          "extensive",
          "extensive"
        ],
        [
          "penetrating",
          "penetrating"
        ]
      ],
      "qualifier": "simile",
      "raw_glosses": [
        "(transitive, simile) To have an extensive and penetrating understanding of (something or someone)."
      ],
      "related": [
        {
          "word": "read like a book"
        }
      ],
      "synonyms": [
        {
          "word": "know inside and out"
        },
        {
          "word": "know like the back of one's hand"
        }
      ],
      "tags": [
        "transitive"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-know like a book.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/c/c0/En-au-know_like_a_book.ogg/En-au-know_like_a_book.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/c/c0/En-au-know_like_a_book.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "word": "know like a book"
}

{
  "forms": [
    {
      "form": "knows like a book",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "knowing like a book",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "knew like a book",
      "tags": [
        "past"
      ]
    },
    {
      "form": "known like a book",
      "tags": [
        "participle",
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "know<,,knew,known> like a book"
      },
      "expansion": "know like a book (third-person singular simple present knows like a book, present participle knowing like a book, simple past knew like a book, past participle known like a book)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "related": [
    {
      "word": "read like a book"
    }
  ],
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English similes",
        "English terms with audio links",
        "English terms with quotations",
        "English transitive verbs",
        "English verbs",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "1851, T. S. Arthur, “That John Mason”, in Off-Hand Sketches",
          "text": "\"He's a bad man, that John Mason, and my advice to you and to every one, is to keep clear of him. I know him like a book.\"",
          "type": "quotation"
        },
        {
          "ref": "1939 June 21, “Slayer Still Free in Woods”, in Leader Post, Saskatchewan, Canada, retrieved 2013-11-18, page 9",
          "text": "Olson can hide out around here until the snow flies if he wants to. He knows these woods—every steam and lake—like a book.",
          "type": "quotation"
        },
        {
          "ref": "1998 March 22, Dave Anderson, “College Basketball: When Sherman White Threw It All Away”, in New York Times, retrieved 2013-11-18",
          "text": "I played with the guy seven days a week; I knew him like a book.",
          "type": "quotation"
        },
        {
          "ref": "2010, Bill Ratcliffe, Liz, page 24",
          "text": "Around here I know the shoreline like a book.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "To have an extensive and penetrating understanding of (something or someone)."
      ],
      "links": [
        [
          "extensive",
          "extensive"
        ],
        [
          "penetrating",
          "penetrating"
        ]
      ],
      "qualifier": "simile",
      "raw_glosses": [
        "(transitive, simile) To have an extensive and penetrating understanding of (something or someone)."
      ],
      "tags": [
        "transitive"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-know like a book.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/c/c0/En-au-know_like_a_book.ogg/En-au-know_like_a_book.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/c/c0/En-au-know_like_a_book.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "synonyms": [
    {
      "word": "know inside and out"
    },
    {
      "word": "know like the back of one's hand"
    }
  ],
  "word": "know like a book"
}