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Just when Private I thinks all is calm-now that he's cracked the case of 7 Ate 9-Question Mark storms into the office. Mark is worried. All the uppercase letters are M-I-S-S-I-N-G! But that's absurd. This is CAPITAL City! Private I is the last letter standing. Will he solve his BIGGEST mystery yet, the UPPER CASE, before it's too late?! Filled with the same humor, wit, and quirkiness of the hit 7 Ate 9: The Untold Story, comes another laugh-out-loud whodunit.
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The Upper Case: Trouble in Capital City | 
