Can you read, not aloud, copyrighted material eg. Books, scientific papers in public eg bus, airplane, cafe, where other people can potentially read it/take picture?
Of course. Copyright law prevents you from making copies, and prevents others from making copies. It doesn’t oblige you to take extreme precautions against vague possibilities that others might break the law.
And reading is not considered “copying”. So you don’t have to prevent others from reading your books at all.