"After an exciting but stressful year and a half, the Young Inventors Guild members finally reunite with their parents, who had continually evidenced a disturbing tendency to go missing. The families head to Cairo, Egypt, to see Noah's mother, the magnificent Ariana Canto-Sagas, perform on the famous opera stage there. But danger arrives in the form of the ever-elusive but always-present Komar Romak. Running out of time, Jasper, Lucy, Faye, Wallace, and Noah must extract key information hidden in the pages of a time, and combine it with their remarkable talents for invention"--Back cover
