James Patterson 
Jacky Ha-Ha 
(Jacky Ha-Ha 1)

With her irresistible urge to tell a joke in every situation – even when she really, really shouldn”t – twelve-year-old Jacky Ha-Ha loves to make people laugh. And cracking wise helps distract her from thinking about not-so-funny things in her life, like her mom serving in a dangerous, faraway war, and a dad who”s hardly ever home.
But no matter how much fun Jacky has, she can”t seem to escape her worries. So one starlit night, she makes a promise to keep her family together… even if she has to give up the one thing that makes her happy. But can she stop being Jacky Ha-Ha, if that”s who she really is?