The Hide and Seek Files by Caeia March

Moss and Biff were devoted to each other. Herton village knew them as the couple who ran the local grocer's store. Their family knew them as the loving couple who were always there when needed. But were they quite what they seemed? Practical Moss with her dark eyes, Bitt with his gentle ways and passion for history. Only the young woman who looked like a dyke guessed the truth, that Biff was a woman.

This novel spans seventy years in the South Yorkshire mining community. It explores the repercussions of concealment and loss of identity for four generations of women seeking out a strange and hidden truth.