If you loved Felix's struggle to survive endless battles in Armor, you'll be gripped by William Mandella's journey through interstellar war in The Forever War. Like Armor, this book is driven by a clear mission—survive the impossible conflict—and captures the relentless urgency and danger of futuristic warfare, with every page pulling you forward.

You watched Felix transform under the pressure of war in Armor—in Old Man's War, John Perry's journey from an ordinary senior citizen to an elite soldier is equally compelling. The book charts his growth, resilience, and adaptation as he faces alien threats, much like Felix's evolution as a hardened survivor.

If you appreciated Felix's internal struggles and questionable choices in Armor, you'll find Takeshi Kovacs in Altered Carbon just as fascinating. Kovacs operates in a gritty world where right and wrong blur, and his actions—often violent or morally ambiguous—echo the conflicted heroism that makes Felix so memorable.

The powered armor and visceral battle scenes in Armor mark it as a standout of military science fiction. Starship Troopers delivers a similar focus on mechanized suits, futuristic weaponry, and the tactical realities of alien warfare—if you enjoyed the nitty-gritty details of Felix's armor and battlefield tactics, you'll love Heinlein's classic.

If Armor kept you on the edge of your seat with its breakneck action and constant danger, All You Need Is Kill offers the same adrenaline rush. Follow Keiji Kiriya as he's trapped in a violent time loop, fighting alien invaders and dying over and over—each chapter accelerates, giving you no time to catch your breath, just like Felix's desperate battles.