The Campaign Builder's Guild

I read a lot of books, be it fantasy horror or science fiction.
But there is only one series i recomend when someone asks me what to read, and that is Dresden Files.

Other books i liked(except some obvous ones nearly everyone here mentioned) are
-Song of earth and power(fantasy)
-Brain Plague(Sci fi)
-Saga of the seven suns(sci fi)
-Tears of artamon(fantasy)
-Risen empire, Killing of Worlds(sci fi)
-Vampire earth(near future)
-The Shadow saga(near future)
-Broken Crescent , Wiz Biz (both treat magic as programing language, first is serious, secont is somewhat comic)
-Perdito street station(didn't realy like his other books)

From campaign settings i like Iron kingdoms

I always liked campaigns with alien ecology.
Just wanting to say that if you look for inspiration go to conceptart.org. They have a creature of the week contest where you can find images of more than enough strange creature to set your creative juices flowing.