"After more than a decade of stability or improvement, the mental health of adolescents plunged in the early 2010s. Rates of depression, anxiety, self-harm, and suicide rose sharply, more than doubling on most measures. Why? In [this book], social psychologist Jonathan Haidt lays out the facts about the epidemic of teen mental illness that hit many countries at the same time. He then investigates the nature of childhood, including why children need...

"Penny has never met anyone smarter than her. That's par for the course when you're a savant--one of less than one hundred in the world. But despite her photographic memory and super-powered intellect, there's one question Penny doesn't know the answer to: where did her father go when he left her and her mother years ago? On Penny's 21st birthday, she receives a card in the mail from her father, just as she has every year since he left. But this birthday...

She's a liar. She's a stalker. She's in your house. When Claire sees Hannah Wilson at an exclusive Manhattan hair salon, it's like a knife slicing through barely healed scars. It may have been ten years since Claire last saw Hannah, but she has thought of her every day, and not in a good way. So Claire does what anyone would do in her position--she stalks her. Hannah is now Mrs. Carter, living the charmed life that should have been Claire's. It's...