Vector, the Fifth Seal

Sylvan Nash is an unlikely super hero. His realm is both microscopic and global--and he works in anonymity. When Dr. Karen Wasserman learns just a fraction of his story, she is intrigued but also suspicious. Investigating several epidemics, she believes Sylvan is involved--but is he a meddlesome amateur with a morbid interest or a mass murderer? She must find out which.