The secret device has gone missing! Isabelle Jones and her sister, Kathryn must race against time to find the villain, Dr. Sinister who has stolen the F-143, a very important secret device from S.P.Y. (Sisters Protecting You), a top secret agency dedicated to protecting the world against super villains. If the secret device is activated, it will destroy the world! Their mission takes them to the beautiful city of Paris, where they must find Dr. Sinister’s hideout and put an end to his evil plans. Can the sisters save the world?
This book was actually written by a 10-year old (I believe). Considering that, the book was kinda cute. Interesting that the heroines were twenty-year-olds; so much older than the author. About second-grade level reading.