Cambridge author Penny Hancock offers us The Darkening Hour – a dark and compelling thriller that explores how human values warp when insecurity sets in. Mona is a migrant domestic worker, slowly being turned into a slave by an increasingly abusive and controlling employer. As London housewife Theodora increases her demands, deflects her problems onto Mona and even confiscates her passport, the two women become trapped in a battle that becomes ever more sinister.