Harlan Ellison, one of the world’s foremost science fiction writers, has died at 84. His death was announced by family friend Christine Valada via twitter. Though Ellison was a longtime resident of Los Angeles, the location of death was not disclosed. Tweeted Valada, the widow of Wolverine creator Len Wein: “Susan Ellison has asked me to announce the passing of writer Harlan Ellison, in his sleep,