The Hypothetical Library is a sort of Borgesian blog run by book cover designer Charile Orr. The blog asks real authors to posit a pretend book, including cover copy and Charlie then designs a cover for it. Of course this makes the book so rich with potential, especially when the copy is good, as it invariably is, that the temptation for any author would be to go ahead and write it. That is, unless the book is dangerous. That's dangerous as in The Dangerous Alphabet, subversive perhaps, but maybe even deadly. That's what this week's guest Neil Gaiman has come up with -- a book so dangerous that reading it would cause the world to end. Seeing the provocative cover that Charlie Orr has come up with certainly evokes a response. You can't help but begin to imagine the words that would be between the covers--to begin postulating the impossible in your own head. Gaiman, the master of the absurd and macabre (always with a touch of fatherly tenderness), is the perfect author for this kind of thing, and he is having a week long stint, which includes an audio book and special e-book version. Check it out, if you dare.