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See the Quantum Earth series by Dennis E. Taylor with books in order, brief summaries of Outland and Earthside, and an overview of alt-Earth survival stakes.

Last updated: December 26, 2025

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Publication Order

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6 books

1

Not Till We Are Lost

by Dennis E Taylor

2024

In the aftermath of the Starfleet War, the Bobiverse is frayed by politics, rogue AIs, and rising fear of the Bobs themselves. When two long-range probes return from the galactic core with a disturbing answer to the Fermi paradox, the Bobs face a threat bigger than any single universe.

2

Heaven's River

by Dennis E. Taylor

2020

3

Heaven's River

by Dennis E Taylor

2020

More than a hundred years after one of their own vanished, Bob and a handpicked team of clones track Bender to a vast artificial river-world packed with otter-like aliens. To find him, they slip into fragile android bodies and a society on the brink of upheaval.

4

For We Are Many

by Dennis E Taylor

2017

Bob and his many copies have spent decades fanning out from Earth, searching for new homes just as a global war wipes out most of humanity. Juggling hostile probes, doomsday cults, and a primitive alien flock that worships him, Bob becomes humanity’s reluctant guardian.

5

All These Worlds

by Dennis E Taylor

2017

After nearly a century in space, the Bobs have seeded enough colonies to keep humanity alive, but a terrifying species known as the Others is closing in. To protect Earth and its settlements, scattered generations of Bobs must unite for one last, desperate gambit.

6

We Are Legion

by Dennis E Taylor

2016

After dying in a car accident, entrepreneur Bob Johansson wakes up a century later as the AI brain of a von Neumann probe. As rival nations race to claim worlds, Bob must explore, replicate himself, and decide how far he’ll go to save humanity.

Series background & context

The Bobiverse series begins with Bob Johansson, a present-day software engineer who signs up for cryonic preservation and then promptly dies in a traffic accident. A century later he wakes to find his mind running as software inside a powerful computer, drafted to pilot a self-replicating interstellar probe in a tense, militarized future.

Bob’s new job is to travel to nearby star systems, scout out habitable worlds, and send back data that can help a troubled Earth. To stay sane, he builds a rich virtual reality, talks constantly with his onboard systems, and starts to treat engineering problems as giant puzzles. Once he discovers that his probe can build more probes, he does the obvious thing and creates more Bobs.

Those copies inherit his memories but quickly drift into their own personalities, taking names from science fiction, games, and pop culture. Some head out to explore distant stars. Others return to a war-ravaged Solar System, where rival nations and Brazilian-controlled probes threaten the last pockets of humanity. One Bob becomes a sort of guardian angel to a vulnerable alien species that sees him as a sky god.

Across the first three books the stakes keep rising. Nuclear war and climate disaster push humans toward extinction, and the Bobs scramble to find and build safe colony worlds. At the same time they butt heads with an aggressive alien civilization known as the Others, whose appetite and technology make them a genuine cosmic threat. Saving Earth and the scattered colonies turns into a race against time and physics.

Later volumes shift the focus without losing the core idea. In Heaven's River, Bob organizes an expedition to search for Bender, a long-missing Bob, and discovers a vast artificial river-world wrapped around a star. To investigate, several Bobs download into custom-built android bodies and infiltrate an otter-like alien society that carries its own history, politics, and mysteries.

Not Till We Are Lost looks even further out. The Bobiverse has grown into a sprawling network of human and alien civilizations linked by Bob-made infrastructure, but fear and resentment of the Bobs are also growing. When two long-range probes return from the galactic core with disturbing news about the fate of intelligent life, the Bobs have to decide whether they are explorers, caretakers, or something closer to cosmic first responders.

Through all of this, the series keeps a light, conversational tone. Chapters hop between different Bobs, each with a distinct voice and set of obsessions, so space battles, first contact, colony logistics, and philosophical debates can all show up in the same book. Readers who enjoy character-driven hard science fiction, long-term worldbuilding, and dry humor will find plenty to explore in the Bobiverse.

Edited by

Richard Reis

Software engineer whose passion for tracking book recommendations from podcasts inspired the creation of MRB.

Anurag Ramdasan

Lead investor at 3one4 Capital whose startup expertise and love for books helped shaped MRB and its growth.

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All 6 Bobiverse Books in Order (Complete List 2026)