Temporal Surges and Shapeshifting Invaders: Rich Horton on Threshold of Eternity by John Brunner and The War of Two Worlds by Poul Anderson
One of the reasons I collect Ace Doubles — aside from the great cover art, and their historical significance — is that they frequently featured early work by some of my favorite authors. That’s definitely the case with Double D-335, which paired very early novels from two of the greatest SF writers of the late 20th Century, John Brunner’s Threshold of Eternity and Poul Anderson’s The War of Two Worlds. Neither volume was reprinted in a standandalone edition after their original…