This is volume 39 in Two Of a Kind .

This book has been graded for interest at 9-12 years.

This book was published 2005 by HarperEntertainment .

Mary-Kate and Ashley Olsen have been huge international stars since the age of nine months, when they shared the role of Michelle in the sit-com `Full House'. With videos, video games, CDs, dolls, books, a fashion line and a magazine under their belts, their market impact is phenomenal.