Many books provoke a visceral reaction, but few really make you itch. Science writer Carl Zimmer's Parasite Rex does just that, provoking a deliciously creepy sense of paranoia in the reader as it explores a long-misunderstood realm of science. While entomologists love to announce that there are more species of insects than all other animals combined, few parasitologists choose to trump that by reminding us that "parasites may outnumber free-living species four to one..." (Read More)