Disclaimer: I'm not sure what the Horrible Histories books are exactly (although I think I get the general idea, just don't know them well) , so this might not be what you're looking for.
Anyway, your DD might like this book - called
Outbreak! Plagues That Changed History - about, well, diseases, etc. Based on the Amazon reviews some people didn't love it - it's great for an interesting read but not
incredibly in depth - but I think it does a nice job of combining 'gross' diseases with history. It looks at diseases in more of historical social/medical context -- eg, how people viewed tuberculosis and thought the plague spread by miasma, etc.
