The Prophecies Begin

The Prophecies Begin (originally titled as simply Warriors or Warrior Cats) is the first of the six-book arcs of the Warriors series, and was published from 2003 to 2004. Its installments are as follows:
 * 1) Into the Wild (January 21, 2003)
 * 2) Fire and Ice (May 27, 2003)
 * 3) Forest of Secrets (October 14, 2003)
 * 4) Rising Storm (January 6, 2004)
 * 5) A Dangerous Path (June 1, 2004)
 * 6) The Darkest Hour (October 5, 2004)