Portia Da Costa 
Continuum 

Can a student become the master?
Uninspired by her mundane office job, Joanna Darrell decides to throw herself into a new way of life that revolves around giving and receiving punishment.
Drawn in by a chain of coincidences, like Alice in a decadent wonderland, she enters a parallel world of perversity and unusual pleasure. But can her experimenting really become a way of life?
From Portia Da Costa, the Sunday Times bestselling author of In Too Deep and How to Seduce a Billionaire