This week’s reads explore the power of the unseen from two unique angles. “Invisible” tackles bullying and the need to be seen, while “Riley Sager’s” The Unknown turns a century-old disappearance into a chilling mystery. One is moving, the other deliciously creepy. Both show that what we can’t see may haunt us most. Visit tinyurl.com/aurr6k9f for all this year’s picks.