Science fiction book where each person has their own halation around their head?

Question

I read a book about 20 years ago, and this is what I remember:

• It was science fiction. (Not fantasy, it was about people here in our world.)
• The protagonist could see halation above the head of each person he saw, in different colors.
• The color and shape of the halation let him know about the person.
• This might have been horror book, but not sure, I don't remember the protagonist to be killing anyone but not sure about it.

Can anyone identify this book?

Answer 1

Insomnia is a novel written by Stephen King.

Ralph Roberts, an elderly widower, is suffering from insomnia. Soon he begins to see things that are invisible to others—auras that represent people's life forces and little bald men who are present at the homes of the dying. Soon Ralph discovers that the fate of the universe is resting on his shoulders.

1. Seeing haloes - check.
2. Halo shape and color tells him about the person - check.
3. Horror book - check. Written by Stephen King no less.