That's for a novel and a figure estimated on average reading speeds with a novel that uses conventional language. Not Shakespeare Where we'd be looking at 30 or 100 hours just to understand the language if you've never read Shakespeare before. The numbers were comparison for when a novel is read for literary discussion.

I recommend change your expectation since each book.

It depends on
Prior knowledge,
Ability to understand the language of the author.
Knowledge of any technical language.
Curiosity
Interest.
Weather
Lighting,
Mood
Time available
Company
Health of someone close to you
How often you've PhotoRead the book
Technical language.
Writers writing skill.
Number of pages.
Layout formatting changes (e-reading device and the lack of location of the text since they can change with spacing... affects some people more than others,
How hot or cold your feet are.
What you ate,
Drank


The list goes on.

No two books are the same.

Why even this post took me longer to write than it normally would with normally fast tying speed. I was asked to serve up some ice cream and am now tying one handed.

Be flexible. The reason a lot of books take so long to read is because we didn't learn to be flexible with our reading.

Alex