For a long time, one of the defining activities of my life has been collecting little facts: I never really grew out of that “show-and-tell” mindset that defined us all as children. There’s nothing I like more than submerging myself in a subject area for a couple of weeks, grabbing as many stories as I can, and then turning to my friends and saying, “Did you know …”

If this makes me sound insufferable, it’s because I probably am, but at least I make up for it by providing little anecdotes about the life of Ludwig von Köchel, the man who invented the system for organising the music of Mozart (he was also an accomplished botanist). It doesn’t even really matter what the area of interest is. Over the course of a couple of weeks this year, I read back to back biographies about Malcolm X before discovering the Swedish band Bob Hund, who sing exclusively in a language I don’t speak, and who I could now deliver a short-ish university lecture on, if anyone was interested (my........

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