Sleep Is Broken Signature Edition

Most sleep books tell you what to do. This one explains why sleep itself has become broken.

Millions of people wake up exhausted despite sleeping for eight hours. Others struggle to fall asleep, wake repeatedly during the night or begin every morning feeling less rested than when they went to bed.

The problem is no longer simply insomnia. Modern sleep has changed.

Artificial light, constant digital stimulation, stress, irregular schedules, poor nutrition and a society that never truly switches off have quietly transformed one of the most essential biological functions into one of the greatest health challenges of our time.

In Sleep Is Broken, Juan Carlos Villegas Príncipe explores the science, psychology and everyday habits that explain why we are sleeping worse than previous generations and, more importantly, how to restore deep, restorative sleep without relying on miracle solutions or fashionable trends.

Drawing on current research and presented in a clear, engaging style, this book connects neuroscience, circadian biology, behaviour, nutrition and modern lifestyle into a practical framework that anyone can understand and apply.

Inside you'll discover:

• Why modern life disrupts the body's natural sleep rhythm.

• The hidden effects of screens, artificial light and constant connectivity.

• How stress silently alters sleep architecture.

• Why sleep quality matters more than sleep quantity.

• The surprising relationship between movement, food, hormones and restorative sleep.

• Practical daily habits that genuinely improve sleep.

• How better sleep influences memory, emotional balance, productivity, longevity and overall health.

This is not a book of quick fixes.

It is an invitation to understand one of the most overlooked crises of modern life and to rebuild the foundations of healthy sleep through knowledge, awareness and sustainable habits.

Part of the Uncomfortable Manuals - Signature Edition, this volume combines rigorous research with accessible writing to challenge assumptions, inspire lasting change and help readers understand the world-and themselves-with greater clarity.

Because sometimes the most important question is not how long are we sleeping?

It's why are we sleeping worse than ever?