I'm not a great fan of the programme, it feels too much like having to watch best mates, which you are not one of them, having a good time!
BUT, the books are brilliant, a catalogue of truly amazing facts, some appear unbelievable, but are true, and you can check them out via the QI website for the actual information source.
I read lots of these books late at night, just before slumber, they could keep you up longer - but you would be the better for it.
You will be quoting some of these facts for a long time. e.g. 16 million people in China live in caves and President Xi Jinping lived in cave when he was young!
Give one to a friend that is a member of Qanon for Christmas!
Ian M Pindar (The writing IMP)