Late nights, addictive technology and minds racing with exam stress and friendship worries: it's no wonder the teenage stereotype is tired eyes and sleeping through the weekend. Just like adults, teenagers are sleeping less now than ever before, yet sleep is crucial to our health and well-being. Internationally renowned expert on the teenage brain, Nicola Morgan, tackles this essential subject – asking why teenagers so desperately need a good night's sleep, exploring what a lack of sleep does to their developing brains, and explaining how to have the best sleep possible.