QI: The Book of General Ignorance is a brilliant read. It is witty, well written and factual. without being laden with dull statistics or uninspiring information. The book is a great buy for anyone who likes the show, or anyone who simply likes a good, instant read.
There are some brilliant facts in the book, and many acquaintances of mine have been quite annoyed when I correct many of their "facts", such as; how many wives Henry VIII actually had, who invented the steam engine, what animals can best survive a nuclear explosion and many more.