Younger e-book readers were especially likely to access e-books on cell phones or computers, while older adults were more likely to use dedicated e-readers. (pewinternet.org)
Also, passengers won't be allowed to browse the Internet which is in line with airline's policy of barring the use of mobile phones or computers while air borne. (goodereader.com)
● Don't look at phone or computer screens two hours before bed. (onnit.com)