Download or read book Adventures of Superman (1987-2006) #516 written by Karl Kesel and published by DC Comics. This book was released on 1994-07-26 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: A ZERO HOUR tie-in! Returning from Smallville, Superman finds the history-warping effects of ZERO HOUR worsening in Metropolis. He's been retroactively replaced by Alpha Centurion as the city's greatest hero!