Tammy Cohen (who formerly wrote as Tamar Cohen) is the author of seven critically acclaimed novels that have been translated into eleven languages. Her psychological thrillers include The Broken, Dying for Christmas and First One Missing.  She is offering for auction a signed copy of her latest novel, When She Was Bad, which is set in a toxic office where a bullying boss sets workmates against each other with disastrous consequences, and which has just been optioned for television.