An hour or two after my school-age son has gone to bed, he sometimes wakes up from a nightmare, walks to my room and mumbles incoherently about what’s scaring him. But he seems off, and I can't get ...

The clock reads 2:37 a.m. Your mind races while your body exhausts itself tossing beneath tangled sheets. If this midnight misery sounds familiar, you’re far from alone. Nearly 70 million Americans ...