what is the next book after forever war

The most commonly recommended next book after The Forever War is Old Man’s War by John Scalzi. A forum recommendation also specifically called it “the logical third book” for readers who just finished Haldeman’s novel.

Why this one comes up

• It has the same military-SF feel.
• It keeps the focus on soldiers, war, and the human cost of conflict.
• Readers often suggest it as a natural follow-up rather than a direct sequel.

Other strong picks

• Armor by John Steakley.
• Starship Troopers by Robert A. Heinlein.
• Rimrunners by C. J. Cherryh.
• The Light Brigade by Kameron Hurley.

If you want the closest vibe

If you liked the anti-war angle and the way time dilation shapes the story, Old Man’s War is the safest next choice. If you want something even grittier and more old-school military SF, Starship Troopers or Armor are also frequent follow-ups.