Reading E-Books Could Be Causing Your Insomnia

Dead tree book lovers listen up! Your preferences may have been validated in a recent study showing that people who read print books sleep better than those reading e-books.

From The New York Times:

Researchers randomly assigned 12 healthy young adults to one of two activities: reading a light-emitting e-book in a dimly lit room for about four hours before bedtime on five consecutive evenings, or reading a printed book for the same amount of time. All participants did both tasks.
...Compared with a printed book, a light-emitting e-book decreased sleepiness, reduced REM sleep (often called dream sleep), and substantially suppressed the normal bedtime rise of melatonin, the hormone that regulates the sleep and wake cycle. The e-book users took longer to fall asleep and felt sleepier in the morning.

As an e-book lover, I say read both: your e-reader during the day and your print book at night!