It doesn't matter if another doesn't want to read a book because the author said something that was offensive, but don't try to control another's value system by limiting their exposure to ideas. If the privilege of writing something one believes in is taken away, then the privilege of believing has been taken away. Freedom to read is the freedom to read anything. I have read many books I wanted to read even though it was prohibited and that's the way I want it to always be. I want it to always be this way because my interest jumps a notch when someone tells me a book's controversial.
Controversial writing causes sparks and keeps our minds alive.
Free people strike sparks, and those sparks are the best evidence of freedom's existence. Stripping books that some people deem inappropriate from high school libraries underrates youthful intelligence, clouds history and dilutes our culture to fit a mold of conformity. Oftentimes books are quite literally judged by their covers. There is much more to most frequently challenged books than a controversial topic. What lies between the covers are breakthroughs in expression, timeless plots, and new perspectives for readers.