Good question (I’d be interested to hear the thoughts of others too - just saying - hint).
I’m currently reading the Songlines by Bruce Chatwin (great lover of non-fiction in this vein), and as to my favourite book of all time? More difficult, but the name that leapt to mind immediately was Norwegian Wood by Haurki Murakami.
Yes, I am all too predictable.
Happy World Book Night!
(I had no idea this was a thing - you live and learn).