If so read on, for US doctors have found that they can be bad for you, causing you to have trouble sleeping and generally making you ill.
Of course, the scientists involved focused on the wrong thing. They got all worried about light emissions and stuff like that, failing to spot the key issue. What were the guinea pigs (must have been smart rodents) reading? I can tell you now that if they had given me Stephen King’s The Shining or James Herberts The Rats (more rodents!) to read then I would most certainly have lost plenty of sleep. Conversely, something long, tedious and earnest or worthy – I don’t know, say Vikram Seth’s A Suitable Boy – would have me nodding off in no time.
Personally, I have the Complete Works of Trollope on my Kindle enabling me to dip at will into whichever of his novels, short stories or travel writing and non-fiction I happen to fancy at any given time.