The Power of Six by Pittacus Lore__The second book (of in the Lorien Legacies series. It's even better than the first and adds a mythological, mystery aspect to it. And the new characters that are introduced are amazing.
The Power of Six is the second book in the young adult science fiction series The Lorien Legacies, written by Pittacus Lore. It is the sequel to I Am Number Four, and was released August 2011 by HarperCollins Publishers.
Six power cards with strategies children can use to combat anxiety just like "Worry Ninjas." "Junior" set of the same cards where I've simplified the language for even younger students or those with more limited verbal skills.