Pete Johnson 
2-Power: The Korski Code 

Sam and Ella are just an ordinary brother and sister – until they discover two amazing things . . .They can send thought messages to each other.They have incredible super powers.Suddenly they’re extraordinary! And then a jewel robbery and a sinister stranger plunge them into a mystery that tests their new super powers to the limit!This is the first book in a brand-new series of thrilling crime-busting adventures aimed at younger readers of 7+. If you’re a fan of Horrid Henry, then the 2-Power books are for you!