Fifth grader Daniel Kwirk is known around Duckworth Elementary School as “Kwirky” (which sounds like “quirky”) because he thinks and acts differently than most kids his age. His Attention Deficit Hyperactivity Disorder, or ADHD, causes him sometimes to be a bit clumsy, not pay attention and have way too much energy for certain occasions. But Daniel has so much more to offer than what people give him credit for. He is intelligent, perceptive and always wants to do the right thing. These attributes help Daniel, with the assistance of his precocious younger sister, Hayley, find clues to discover the theft of valuable gold and silver coins at a local Civil War exhibit and help police track down the culprits. Daniel's unconventional approach to everyday life, while frustrating at times, proves to be extremely useful as only someone with Daniel's unique perspective could have cracked this case.

ＡＤＨＤを欠点ではなく、誰も真似できない鋭い知性と直感への入り口として描く点に、本作の真の豊かさがあります。世間からクワーキー（風変わり）と揶揄される少年ダニエルの内面を、著者は単なる理解の対象としてではなく、世界を再定義する強固な力として鮮やかに昇華させました。不器用さの裏側に潜む圧倒的な感受性が、物語に唯一無二の彩りを与えています。 妹ヘイリーとの見事な連携が生む謎解きは、多動な思考が独自の論理で結実する瞬間をスリリングに描き出し、読者の知的好奇心を激しく揺さぶります。特性を武器に変え、不可能を可能にする彼の姿は、多様な個性の美しさを力強く肯定しており、読み終えた後には世界の見え方が一変するような深い感動が待っています。これは、全ての「個」に捧げられた魂の讃歌です。