Why We Sleep

Why We Sleep

Unlocking the Power of Sleep and Dreams

Written by a neuroscientist and director of UC Berkeley’s Sleep and Neuroimaging Lab, the author, Matthew Walker, PhD explores the purpose of slumber and its little acknowledged or understood crucial functions as related to mood, chronic disease, obesity, cancer, diabetes, Alzheimer’s, etc. He explains how to harness the transformative power of adequate sleep and how to sleep better tonight.


The information was extremely detailed. I like that it covered every different aspect of sleep from types/stages, life cycle, dreaming, medications and disease states. No stone left unturned. – Stacy H. 5/31/22

I appreciated the discussion of new research on sleep habits. Very good book and home study. - 5/2020

I liked how much of the book was fascinating as it relates to health and how the test questions help retain this important knowledge to help others. - JT 1/2021

Dr. Matthew Walker, PhD
Course Expiration Date: Mar-05-2027
Course Performance Indicators: 4.1.2, 4.2.5, 8.1.2, 8.2.1
Product Name

Book Only (2410)

Regular price $25.00 $17.00

15 CE Online Test Only (W2411)

Regular price $125.00

23 CE Online Test Only (W2412)

Regular price $145.00

15 CE Book & Online Test (W2413)

Regular price $145.00

23 CE Book & Online Test (W2414)

Regular price $165.00

Book Details

Author Dr. Matthew Walker, PhD
Year Published 2017
Edition 1st Edition
Publisher Scribner
ISBN 978-1501144325
Format Hardback
Page Count 360
CDR Activity Numbers
  • 15 CE Online Test Only: 181753
  • 23 CE Online Test Only: 181752
  • 15 CE Book & Online Test: 181753
  • 23 CE Book & Online Test: 181752

Course Objectives

Level 1 & 2 CPE

CPE Type: 740 for Web-based/Online Tests

Upon successful completion, the users will be able to:

1. Discuss the four functions of sleep and its contribution to human health.

2. Describe three negative effects of too little sleep.

3. Define the role of circadian rhythm to sleep. 

4. Compare two key functions of NREM and REM sleep.

5. Identify four ways dreaming effects information processing.

6. Explain three ways how lack of sleep effects appetite.

7. List three chronic diseases that can become worse with lack of sleep.

Recommended For...

Registered Dietitian (RD/RDN)
Dietetics Technician Registered (DTR/NDTR)
Integrative & Functional Nutrition Academy Professional
Certified Diabetes Care & Education Specialists (CDCES)
American College of Sports Medicine

Why We Chose This Book

This highly qualified practitioner has organized known biochemistry, researched disease processes, and extensive clinical experience into a highly readable and fascinating book on sleep and its functions as they contribute to health and quality of life. 

About the Author

Matthew Walker, PhD is a neuroscientist and director of UC Berkeley’s Sleep and Neuroimaging Lab. He is highly respected and considered an expert in sleep studies. He has published over one hundred scientific studies.