Search - Spy X: The Code

A great spy adventure book for your 4th grade and up reader. This is about twelve year old twins Andrew and Evie, whose mother disappeared on their 11th birthday and now they have relocated and are struggling in their new life without Mom. They receive a mysterious package and have been chosen to perform a dangerous task. They have only each other...and Spy X

If you like the 39 Clues books, you will like this series of books. A brother and sister find themselves trying to figure out clues like spies to track down where their mother is. Lots of gadgets and suspenseful events.