If you don't know, there is a weekly podcast by the QI Elves. It's called No Such Thing As A Fish and I highly recommend it. It takes the 4 researchers (James Harking, Andrew Hunter Murray, Anna Ptaszynski & Dan Schreiber) each discussing one of the favourite things they have earned in the past week.
It's no real surprise then that eventually it was going to turn into a book. It's got a slightly strange format, in that it's split up into alphabetical order. So, for example, Z gives us facts on Youguang Zhou, Zika virus, Zimbabwe, Zombies, Crypto-Zoology, Zoos, Mark Zuckerberg and Zyzzyva (it's a tropical weevil in case you were wondering). Unlike the normal QI books there's a few paragraphs to each fact, which gives more of a background. It's not just the facts, which makes it a lot more entertaining. On the other hand, also in the Z category is the Zoology (non crypto) section, which is basically a list of topics discussed elsewhere with links to them, which is a bit of a waste of space. A cynic would call it a bulking technique.
That quibble aside, it's an amusing entertaining read, and I guarantee there will be something in there you didn't know you needed to know.