Brain on Fire by Susannah Cahalan

In her twenties, Cahalan was looking at a promising career as a journalist for the New York Post.  The possible undoing of that future began with a seizure. Then an inability to finish an assignment.  Then it was full blown paranoia.  Something was wrong.  Was she crazy?  All the brain tests seemed to indicate no problem with her brain.  Then one doctor decides to look outside the traditional medical boxes and identifies the rare condition of anti-NMDA-receptor autoimmune encephalitis.  But knowing what is wrong is just the beginning of a much longer journey in her "month of madness.