UPDATED IN 2024 Many parents feel pressured to "train" babies and young children to sleep. But kids don't need to be trained to sleep--they're built to sleep. Sleep issues arise when parents (with the best of intentions) over-help or "helicopter parent" at night, overshadowing their baby's innate biological ability to sleep well. In The Happy Sleeper, child sleep experts Heather Turgeon and Julie Wright show parents...