[SparX]

I don't read it much online on my laptop I actually use an app I found in the google playstore =O So I read most of mine on the go off my phone =3
The app is called Mangazoo
It has 4 sources (which I would assume you can find these places and probably will find them and link them later) The sources are Taadd, Mangago, MangaFox and MangaHere(Eng).
From there you can find books by category or author, or search for one you know you want to read.
Mangago (to me) seems to have the most selection, including some far out DJ I've never even heard or thought of =O
As for horror It isn't quite horror as macabre and taboo I've been reading Shintarou Kago's works.
A page dedicated to him and his works