My son recently read couple of World War 2 related stories like lord of flies, War of the Worlds and The kingdom by the sea - robert westall and looks like he is very disturbed after that. He has been getting anxiety attack and afraid of plain sound as in war can happen. There could be multiple reasons for his anxiety but recent books might have contributed some thing so now I just want to give me funny books. Can you please suggest funny books for 10 years old avid read.