OF SUGAR & SNOW, the history of ice cream making by Jeri Quinzio. Okay, so Nero poured honey onto snow, but actually, no, that's not ice cream!
I've also been having chats with the charming Ian at Mr Whippy, who has been giving me the lowdown on the how the music jingle works. I'd assumed something boring like a button. Apparently not. Back in 1962 (which is when my heroine's ice cream van was on the road) the driver wound it up each time - he even sent me a photograph of the mechanism. Such tidbits of information are gems that the author can take full advantage of.
I will, very soon, actually have to get down to writing, but for now I'm just having fun.