Happy World
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The Happy World book series by 竹下けんじろう includes books Happy world! 9 (Young Jump Comics) (2005) ISBN: 4088768450 [Japanese Import] and Happy world! 10 (Young Jump Comics) (2006) ISBN: 4088770609 [Japanese Import]. See the complete Happy World series book list in order, box sets or omnibus editions, and companion titles.
2 Books
#9
![Happy world! 9 (Young Jump Comics) (2005) ISBN: 4088768450 [Japanese Import] - Book #9 of the Happy World](https://m.media-amazon.com/images/I/41RPAE9YYGL._SL350_.jpg "Happy world! 9 (Young Jump Comics) (2005) ISBN: 4088768450 [Japanese Import]")
#10
![Happy world! 10 (Young Jump Comics) (2006) ISBN: 4088770609 [Japanese Import] - Book #10 of the Happy World](https://m.media-amazon.com/images/I/31ZDSWWY8BL._SL350_.jpg "Happy world! 10 (Young Jump Comics) (2006) ISBN: 4088770609 [Japanese Import]")
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