The Jewelled Moth
Book 2 of 4 in the Sinclair's Mysteries series.
"Wonder at the puzzling disappearance of the Jewelled Moth! Marvel as our heroines, Sophie and Lil, don cunning disguises, mingle in high society and munch many cucumber sandwiches to solve this curious case! Applaud their bravery as they follow a trail of terrible secrets that leads straight to London’s most dangerous criminal mastermind, and could put their own lives at risk . . ."