I'm a big fan of Jim Butcher's Dresden Files and have recently started through them again, cuz they are that good, starting with book 1, Storm Front.
In the book Dresden is looking for an evil sorcerer

Dresden concluded, after examining the contents of the other crates and boxes that, with the absinthe as the base, and the other ingredients at hand, the evil sorcerer must have been making the dangerous Third-Eye, the newest drug to sweep the streets, leaving its victims mad from visions of great and horrible darkness . . .
Now, I like the Dresden Files books and have been reading them for much longer than I've been enjoying absinthe, and I plan on continuing to read them all the way through book 23 when I am certain Dresden will save the multi-verse, single-handed, with one hand tied behind his back, and a blindfold on, but when first I read this one, and second, third and more times, I completely missed the reference. I also plan to continue drinking absinthe . . .
Maredudd