"In Mercy 6, David Bajo's courageous new medical thriller, four people collapse dead in the same instant within a newly renovated Los Angeles hospital. Dr. Mendenhall, the woman who is head of the emergency room, isn't convinced the cause of death is a contagion. But it's in the interests of the hospital administrators - and of the world at large - for people to think that it is. If the world knew the truth there could only be widespread panic. The...