If you enjoyed the way Ross Murdock and Travis Fox are swept into a high-stakes mission involving time travel and espionage in The Time Traders, then you'll love The Door Into Summer. Heinlein's protagonist, Dan Davis, is also propelled by a clear goal—righting personal wrongs—driven by inventive time travel mechanics and a suspenseful, forward-moving plot. The sense of purpose and ingenuity, alongside the tension of changing the past for a better future, will keep you hooked.

If you were drawn to the diverse team of traders and agents—each with unique skills and personalities—teaming up in The Time Traders, then The Stainless Steel Rat will introduce you to another lively cast. Slippery Jim DiGriz, with his knack for assembling a network of allies and navigating complex missions, brings humor and camaraderie to the story, making for an entertaining and action-packed adventure with a memorable ensemble.

If you appreciated how The Time Traders transported you across epochs and civilizations—from the Bronze Age to the future—The Forever War ramps up the scope with interstellar battles, time dilation, and cultural shifts over centuries. You'll experience the protagonist's journey through war and adaptation to a changing universe, offering that same sense of vast historical and technological sweep.

If the concept of time travel as a catalyst for adventure and deep personal challenge excited you in The Time Traders, then Kindred will grip you from the start. Dana, the protagonist, is repeatedly pulled from present-day to antebellum Maryland, confronting danger and difficult choices that echo the disorientation and survival stakes Ross faces in the past. Butler’s novel explores the impact of time travel on identity and morality, blending gripping storytelling with thought-provoking themes.

If you admired how The Time Traders immersed you in both ancient and futuristic civilizations, with detailed customs and technologies, then The Dispossessed will fascinate you. Le Guin’s novel unfolds across two contrasting planets—one utopian, one capitalist—exploring their societies through the eyes of physicist Shevek. The depth and nuance of the worldbuilding will draw you in, much like Norton's richly imagined pasts and futures.