Plots, spies and inventors abound in an epic adventure set between London and Paris ...

At her dull Victorian academy, fourteen-year-old Winnie dreams of becoming a top inventor like her father.

When he mysteriously vanishes, she is determined to find him – but how?

Help comes unexpectedly from her headmistress. Turns out, her school is recruiting remarkable young women to guard Her Majesty the Queen.

Soon, Winnie is not only protecting royalty – but developing the spy skills she needs to save her beloved Papa.