ONE OF OUR DINOSAURS IS MISSING (1975)
ROBERT STEVENSON
Plot
It's Nanny Hettie to the rescue when British Intelligence Agent Lord Southmere is captured by Chinese agent Wan. Hettie is the only one who knows Southmere's secret: he has stolen a piece of top-secret microfilm from a Chinese warlord and hidden it in the skeleton of a dinosaur in a London museum. Aided by a small army of fellow nannies Hettie sets about generally saving the day. Ustinov's OTT Chinese baddie verges on camp xenophobia, but if you're under nine this is a great old fashioned kids' adventure.