Brain fatigue?

I was reading a book. It was in "the about the author" section, where there is a list of work the author has done, when I had to stop. Should I read this long list of stories, novels, that the writer had written? Do I really want to know? Or to be exact, do I need to memorize them?

I always have this idea that if I use my brain too much it will detoriate. It's like using a floppy disk too many times. It wears out. Thus, if I memorize things too much, my brain will wear out? I don't like to memorize things for this [silly?] reason. Or, if you use a battery - charge and discharge - too many times, the quality will go down quickly. But is our brain really like that?

On the other hand, if I don't use (anything), then whatever it is it will not function proprely either. An example of this is exercise. I don't work out regularly. So, when I play badminton with my kids, my body aches. I concluded that if I don't use my brain regularly, it won't be in a good shape. But I am still afraid of using it too much.

I was reminded with something that I read earlier in Jack Foster's "How To Get Ideas."

"The brain is not a muscle that gets fatigued."

Whoa! Does it mean that I don't have to worry using my brain too many times? Is it true?