An adult science-fiction trilogy

BetweenTwo Suns

Science taught her to doubt.
Contact taught her to listen.

Cover of The ReturnCover of The WaveCover of My Journey to Planet Erra
3 novels
2 worlds
1 choice
Transmission detected · Utrecht / Erra
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ContactConsciousnessScienceConsentTwo worldsOne human voice
13light-years from certainty

The premise

What if the impossible did not ask for belief—only attention?

Dr Elsa Meijer is a theoretical physicist from Utrecht. Her encounter with the Plejaren does more than redraw the map of the universe. It forces science, family and power to confront the same question: who are we when reality becomes larger than the systems built to contain it?

Three movements · one journey

The trilogy

From a private encounter beneath Mount Pilatus to a choice that belongs to the whole planet.
01
Cover of Between Two Suns: My Journey to Planet Erra

Book I · The awakening

My Journey to Planet Erra

A physicist follows an impossible signal from Utrecht to a civilization beneath two suns—and returns with a truth large enough to fracture reality.

02
Cover of Between Two Suns: The Wave

Book II · The aftershock

The Wave

Elsa is home. Her story is spreading. And the truth moves through science, power and fear like a wave no institution can contain.

03
Cover of Between Two Suns: The Return

Book III · The reckoning

The Return

A new signal is changing human bodies across the world. Contact is no longer Elsa’s alone—and neither is the choice it demands.

Elsa and Anke beside an oak tree in Utrecht
01 / Earth

The known world

Rain on old brick. University corridors. A sister who needs proof. The gravity of ordinary life after an extraordinary journey.

Erra beneath its two suns
02 / Erra

The remembered world

Crystal cities, resonant technology and a civilisation that understands consciousness as part of the architecture of reality.

Cross the threshold

A screen adaptation waiting to happen

See the signal move

A 45-second cinematic teaser concept: Utrecht in rain, a crystalline call, the threshold—and a first impossible sunrise.
Elsa faces an impossible crystalline signal in UtrechtElsa and Semjase look over Erra beneath two suns

Concept trailer · visual placeholder

One signal.
Two worlds.

Elsa and Semjase walking across a luminous bridge on Erra

I was trained to doubt.
What happened shattered my understanding of reality.

Elsa Meijer

The visual archive

Moments between worlds

A cinematic record of discovery, evidence, connection and consequence across all three books.
The crystalline Archive on Erra
01Memory
Elsa and three distant participants breathe in one quiet rhythm
02Witness
A dark structure above the Atlantic
03Contact
Elsa and Semjase on a luminous bridge
04Connection
A blue crystal activates in a laboratory
05Evidence
An unplugged laboratory lever moves as two women react
06Consequence
A crystalline mountain projection illuminates a dark Utrecht roomUtrecht · 2026

About the author

Egbert Halderman

Egbert is a Dutch author whose work explores the meeting point of science, consciousness, spirituality, technology and human experience. The questions behind the trilogy are simple to ask—and impossible to exhaust: Who are we? Where do we come from? What is our place in the universe?

Read the story behind the story

Begin at the threshold

Your first journey
starts on Earth.

Discover book one on Amazon