Under the Dome is a mammoth,  monster of a book. Most wont have the dedication to read such a book.

 Its up there with Infinite Jest by David  F. Wallace .

It gonna be a TV show soon, so many will learn of it that way. 

Its a Sci-Fi book, there are no monsters, no super natural events, no magic.

Only space aliens that are not seen; and a whole lot of humans

Lots of humans. The book has 110 'named' characters .

and with humans...there is all ways 

horror. 

In horror fiction, humans make the best subjects. 

Humans make the best monsters.