Smells can make you fall in love. Parasites can make you crazy. Faith is in the genes. There are fires burning inside your cells and lies flaming in your thymus...Intensely personal and brilliantly scientific, Faith, Madness, and Spontaneous Human Combustion reveals the startling ways in which science--especially immunology and pathology-shapes our destinies, and how something as intimate as our own identities can be connected to the intricate workings of the machines known as our bodies.