A year after her high school graduation in 1933, Clair Blank's first four books in the Beverly Gray series had been published -- she was a published author at the age of 18. In 1935, she wrote The Adventure Girls at the K Bar O and was immediately asked by the publisher for two additional stories so that it could be made into a series.
Clair Blank lived in Allentown, Pennsylvania. She graduated from college, became a typist and secretary, and during World War II worked as a volunteer for American Women’s Voluntary Services, a group that drove visiting Army officers around locally. She married George Elmer Moyer, a welder, in 1943 and had two sons.
Except for a totally extraneous last chapter, this was a solid "cozy" mystery focused on Beverly's undercover assignment to keep an eye on a suspicious scientist. Since World War II was mentioned in an earlier book, when Terry joined the English military to fight for his country, it's odd that no specific mention is made of the U.S. being at war in this one, which was published in 1944, but that may have been a publisher's decision. I expect readers at the time read between the lines. Otherwise, having Larry fly off to England to work on the plans for a new plane would also have seemed a bit strange. Most of the young men the girls are dating or engaged to would have enlisted by now if the story line had tried to be completely realistic. Read today, it actually holds up pretty well.