Janice Gray is an author about whom I have been able to find out very little: a Janice Gray was writing romances for Mills and Boon at about the same time A Credit to the Family was written, but I have not been able to find out if the two authors are one and the same.
Finding the book
It is extraordinarily difficult to find.
Sources and links
British Library catalogue
Thank you to Lisa Catz for the photograph and information on the book.