In an increasingly ageing society, medicine, hygiene and nutrition have reduced the impact of acute and life-threatening illnesses. However, whilst we are living longer, the chance of developing or contracting a chronic illness is increasing. There are a growing number of working adults affected by chronic health conditions that may be largely invisible to those around them. In this book, the author explores the 'silent' problem of unseen illness at work. The author employs qualitative research methods to challenge the idea that if you look well, you must be well. While demonstrating the effectiveness of this controversial methodology, she uses it to expose the voices of a group of marginalized workplace actors who have hitherto remained unheard. Stories from people with cancer, multiple sclerosis, endometriosis and other illnesses are interspersed with the author's reflections about life and work with illness that others cannot see. These stories reflect a passage of trauma and marginalization, but also foreground themes of survival.