Herbert Quidley, a vain, womanizing bibliophile, thinks he has simply found a clever diversion when he discovers a coded note hidden in an old literary volume at the library. But when the beautiful Kay Smith checks out the same book and removes the message, and a second woman secretly slips in another, he realizes the odd typing exercise may be a deliberate code meant for someone specific. Intrigued, he begins watching the book and the women connected to it, convinced he has stumbled onto something far more deliberate than random gibberish. Quidley follows Kay after the library and engineers a clumsy but effective encounter at an all-night coffee bar, using his practiced charm, a spilled sugar accident, and flirtatious banter to win an invitation to her home. Kay's cool blue eyes and slight accent suggest she is not entirely ordinary, yet she responds to his advances and agrees to see him again. As another striking woman appears at the library and heads for the same book, the hidden messages multiply, drawing Quidley deeper into a strange, seductive mystery of coded notes, shifting identities, and romantic intrigue. This edition has been fully restored with modern typesetting, custom cover design.