From WoWWiki

Characters:

  Karll [Dwarf Hunter] on Azjol-Nerub.
  Kre   [Orc Rogue]    on Spirestone.

Previously played Warcraft games:

  Warcraft: Orcs and Humans
  Warcraft 2: Tides of Darkness
  Warcraft 2: Beyond the Dark Portal
  Warcraft 3: Reign of Chaos
  Warcraft 3: The Frozen Throne

Warcraft books read:

  Lord of the Clans
  Day of the Dragon
  The Last Guardian