On May 12, New York Magazine's Daily Intelligencer reported that HarperCollins had been keeping a top-secret title entirely under wrap for months—not securing any press, or even revealing cover art until the the book's publication day on May 13.
Twenty-four hours later, the book, a memoir of a man who claims that 12 years of research revealed that his father was the infamous Zodiac Killer, jumped over 100,000 spots on Amazon's overall bestseller list.
On the afternoon of May 12, Gary Stewart's The Most Dangerous Animal of All: Searching for My Father and Finding the Zodiac Killer, sat at #140,113 on Amazon's list, according to New York. Twenty-four hours later, it reached #148 on the same list, hitting #1 in subcategories on serial killers and crime & criminals, and #22 in biographies and memoirs.
