With their vacation plans and the safety of London at risk, the Math Kids are in for their most complex

case yet!

After a tough end to the school year, the Math Kids--Jordan, Justin, Stephanie, and Catherine--take a

jet to London for an exciting summer vacation. But between exploring the city and seeing the sights,

they're quickly drawn into investigations of terrorist activity.

Authorities are on high alert because of threats to landmarks across the city. But there's something odd

about the messages. Working alongside Bobby, a police officer tasked with being their trip guide, the

kids must uncover the true purpose of a mysterious online message board or risk being sent home

early.

This brain-teasing math mystery will be a hit with kids eager to solve puzzles with the characters. -- Booklife

Finalist for the Foreword INDIES Book of the Year Awards