Jul 25, 12
Read from July 18 to 25, 2012
If you like the show, you'll like this book, too (though it only contains information that has already been discussed on QI, so it will mainly be usefull if you need more proof than 'I saw that on a TV-show' to convince your relatives of the fact that the universe is actually beige).
I liked that they put some quotes from the episodes where they discussed the subjects and I'd loved it if there had been some more.
Overall: Actually very interesting.