A Question for the Hive Mind

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When  I was single digits years old, I discovered that my next-door neighbor and first girlfriend Susan Richards (who later beat me into print by years with Hubert, the Caterpillar Who Thought He Was a Mustache) read more than one book at once.

Back then, I read one book at a time. I asked my mother what was correct and she firmly told me to finish each book before reading the next.

Who was correct? Mom or Susie? And does that answer apply to my adult reading?

I solicit your input. Answers that simply state your preference without explaining why will be deleted. It's your reasoning that I'm most interested in.

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