"The Secret of the Two Way Mirror" is a classic mystery novel written by Quentin Reynolds and published in 1955. It features:
* A unique premise: The story revolves around a two-way mirror, a seemingly ordinary object that becomes the centerpiece of a deadly game of cat and mouse.
* Intrigue and suspense: The protagonist, a private detective, finds himself trapped in a web of deceit and murder, forced to unravel the truth before it's too late.
* Fast-paced action: The plot unfolds quickly, keeping the reader on the edge of their seat throughout the book.
While there isn't a book titled "Characters a Secret for Two" by Quentin Reynolds, it's possible you've encountered a similar title or are remembering a different work.
Let me know if you have more details about the book you're looking for, and I can try to help you find it!