Why are some of those books on the list?

Because the narrow-minded so-and-so's who get themselves elected or appointed to positions of power over these things can't deal with concepts which don't gel with their idea of the way the universe is - or, at least, ought to be - in their not-so-humble opinions.

"Of Mice and Men" doesn't cast a very good light on life in the US at that time, and "Lord of the Flies" dares to suggest that a bunch of boys marooned on an island won't all turn into good little boy scouts, choose a leader and live happily ever after.

Reason enough, for moronic hicks of that ilk!

The idiot also known as Capfka ...