code: def book(symbol=None, token='', version=''):
      '''Book shows IEX’s bids and asks for given symbols.
  
      https://iexcloud.io/docs/api/#deep-book
  
      Args:
          symbol (string); Ticker to request
          token (string); Access token
          version (string); API version
  
      Returns:
          dict: result
      '''
      _raiseIfNotStr(symbol)
      if symbol:
          return _getJson('deep/book?symbols=' + symbol, token, version)
      return _getJson('deep/book', token, versionf book(symbol=None, token='', version=''):
      '''Book shows IEX’s bids and asks for given symbols.
  
      https://iexcloud.io/docs/api/#deep-book
  
      Args:
          symbol (string); Ticker to request
          token (string); Access token
          version (string); API version
  
      Returns:
          dict: result
      '''
      _raiseIfNotStr(symbol)
      if symbol:
          return _getJson('deep/book?symbols=' + symbol, token, version)
      return _getJson('deep/book', token, version)
docs: Book shows IEX’s bids and asks for given symbols.
  
      https://iexcloud.io/docs/api/#deep-book
  
      Args:
          symbol (string); Ticker to request
          token (string); Access token
          version (string); API version
  
      Returns:
          dict: result