The Unknown Quantity is a mystery novel by Mignon G. Eberhart published by Random House in 1953 [1] and was issued in the UK by Collins Crime Club that same year. [2] It was reprinted in 1990 by Warner Books.[ citation needed]
The Unknown Quantity is a mystery novel by Mignon G. Eberhart published by Random House in 1953 [1] and was issued in the UK by Collins Crime Club that same year. [2] It was reprinted in 1990 by Warner Books.[ citation needed]