If any book has words, then it may as well contain sensitive or controversial issues. If we ban all books, then no one will be offended by potentailly sensite of controversial words

In all seriousness, teachers are professionals, and we encourage students to read books to open their minds, explore themes, and examine literature; there are bound to be issues that someone (note singular form) finds to be "sensitive" or "controversial", but with censorship of any potential lesson a book may contain, reading choices are severely reduced by the chance that one be offended.

Please leave book selection to the reader and the teacher guiding that reader rather than crafting a regulation about what can be read in a classroom.