Can anyone recommend me a good mystery/suspense manga? It can be something like Detective School Q, Eden no Ori or Boku dake ga Inai Machi. Basically mangas with a mystery element in them which slowly reveals itself as the manga progresses.
Bloody Monday is nice suspence manga about a terrorist group threatening Japan with a deadly virus they stole and some three letter government unit trying to catch them. It's good, although clichéd at points and with a lot of twists.
Death Note is a classic.
Another is a good mystery / not-quite-horror-but-has-some-element-of-it with a slowly revealing plot. I read the manga, the novel and watched the anime, and I like all of them.
I like Detective Conan and think the overarcing story is really interesting, but it just gets sidetracked so much, that if you haven't read it yet it is probably too much with it's 970 chapters.