It takes a certain kind of author to come up with stories as odd as "The Quickening" (one character in which is a very enigmatic talking rabbit), "The Situation" (office politics where the manager literally self-ignites when angry) and "Errata" (a reporter, trapped in a flooded Lake Baikal hotel with seals and - for reasons unknown - a penguin called Juliette).
"The Goat Variations," imagining the events of 9/11 through a series of alternate realities, kept me up at night; I was really disturbed by it, but found it compelling in a sort of strange way. I guess that's how I feel about most of VanderMeer's writing: it's wonderful, and bizarre, and it keeps me coming back for more.