Português
VOL. 2 Cover of The Crystal Portal

Commander Halen · VOL. 2 · by Caio Velmar

The Crystal Portal

On the other side of the portal, nothing is what it seems — a space adventure novel

Series
Commander Halen · Stellar Frontiers
Volume
2 / 4
Author
Caio Velmar
Published
Format
Kindle eBook · US$ 3.99
Portuguese edition
O Portal de Cristal
Buy on Amazon US Also on Amazon Brazil

The echo left behind on Verath-9 wasn't a distress call. It was an address. When the Limiar reaches the coordinates the signal pointed to, it finds a crystalline portal suspended in the void — a structure no AICR catalog recognizes, leading to a world that, according to the official record, shouldn't exist. Commander Halen must decide what to do with what she finds on the other side before the agency decides for her.

Why readers love this book

  • The Limiar's crew split between playing it safe and protecting what they've found
  • A sixty-year-old institutional secret starting to surface
  • The same ethical rigor of book one, now with the stakes raised considerably
  • Mission two of a saga that rewards readers of Book 1 — and welcomes newcomers just as well

For readers who want space mystery with real consequences, not just spectacle. Step through the portal today.

Get “The Crystal Portal” on Amazon

VOL. 3 Cover of The Voice of the Abyss

The Voice of the Abyss: Space Opera (Commander Halen #3)

A signal identical to the one from Verath-9 arrives from a place where no civilization should exist — and this time, someone aboard the Limiar itself is sabotaging the mission from within. As Commander Halen tries to trace the signal's origin, she discovers the ship's systems have been remotely altered, the logs tampered with, and one of her own crew has been following orders he never revealed to her.

VOL. 1 Cover of Echo of the Quasar

Echo of the Quasar: A Space Opera Novel (Commander Halen #1)

An impossible signal reaches the edge of known space — modulated, deliberate, coming from a planet where no instrument detects life. Commander Seren Halen takes the Limiar to investigate. What the crew finds on Verath-9 isn't an empty world: it's an entire civilization, alive inside the crystal formations covering the planet — and their arrival has already begun erasing it.

VOL. 4 Cover of Return to Eridani

Return to Eridani: A Space Opera Novel (Commander Halen #4)

After violating the very law she swore to protect, Commander Halen returns to AICR headquarters to answer for everything she's done — and everything she's uncovered. The man who architected decades of institutional silence is waiting for her, and this time he won't operate from the shadows. Halen walks into the final hearing carrying, literally under her own skin, living proof of everything the institution tried to erase.

See every Stellar Frontiers book →