獲美國青少年圖書館協會金牌推薦（Junior Library Guild Gold Standard Selection）
沒有她破不了的案子，只是過程通常都是一場美麗的意外！
剛滿十一歲的少女凱西（Casey）人生最大的夢想就是成為一名偉大的私家偵探，不論案子多大或多小，都逃不過她的法眼。不過……她其實沒有想像中那麼料事如神，像是學校的惡毒女孩蒂娜（Dina）每次都能把她嗆得啞口無言，而凱西自己更是經常在心儀的男孩 AJ 面前摔得四腳朝天、鬧出一堆超級尷尬的災難。
就在凱西生日這天，她收到了夢寐以求的放大鏡與雙筒望遠鏡，這群最強裝備正好派上用場——因為她眼前出現了今天的頭號神祕案件：一隻名叫「馬芬先生」的流浪貓！儘管父母堅持這隻貓體型太大，絕對不是肚子餓的流浪貓，但凱西決定發揮偵探精神，誓言說服爸媽收留牠。與此同時，班上剛來的新同學，似乎是成為她偵探新死黨的完美人選？凱西已經全面進入調查狀態，在所有案件結案之前，她絕不罷休！
Diary of a Wimpy Kid meets Nancy Drew meets Amelia Bedelia in this hilarious young graphic novel series featuring an aspiring detective who will solve any case . . . usually accidentally.
Casey wants nothing more than to be a detective. No mystery is too big or small for her to tackle! OK, so she doesn't see everything coming—mean girl Dina always has the last word, and Casey is constantly falling into embarrassing disasters in front of cute boy AJ.
But now, it's Casey's eleventh birthday, and she's just been given a magnifying glass and a pair of binoculars—perfect gifts for today's mystery: Mr. Muffin, a cat Casey's parents insist is too big to be a hungry stray. Will Casey manage to convince them he belongs with her? More importantly, could that new girl in school be the perfect contender for a new best friend? Casey's on the job, and she won't stop till all cases are closed.
Fresh talent Kay Healy's winsome heroine, crackling wit, and charmingly geometric characters alchemize to comedy gold. Voracious young comics fans won't want to miss Casey's laugh-out-loud debut.
A Junior Library Guild Gold Standard Selection
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