Phyllis A. Whitney: Mystery of the Hidden Hand

January 1980 was the Signet publication of Mystery of the Hidden Hand by Phyllis A. Whitney. Gale and her brother Warren were visiting their uncle in Greece and got caught up in a mystery about their family and a secret that threatened to destroy them!

Allan Kass shows our two siblings near some Grecian ruins and digging for clues. They look as if they've been startled by someone or excited at their find.  I like that the children look enough alike to be siblings and are dressed casually. It's a neat cover and I like Allan's detail with the ruins.