C. William Tressler

Come on an adventure with me

Under a Crystal Moon Coming October 13,2026

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Are you ready for Kash and Calynn’s next adventure?

Coming: October 13,2026

A corrupt prison. A moon poisoned by dust. And a rescue that will push them all to the breaking point.

Under a Crystal Moon is a heart-pounding sci-fi adventure filled with found family, high-stakes action, dark secrets, and someone far more dangerous already watching from the shadows.

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The Kash and Calynn Series


The Kash and Calynn series is a character-driven science fiction adventure saga following a spacefaring former legionnaire, known for his ability to acquire anything, and his stunningly brilliant pilot as they navigate dangerous jobs, moral gray areas, and the growing consequences of their choices.

The series should be read in order:

  1. Poncia Problems (Book 1)

  2. Disaster in Transport (Book 2)

  3. The Nebula Royale (Book 3)

  4. Under a Crystal Moon (Book 4)

Science fiction book cover titled "Poncia Problems" featuring a silhouette of a man in a suit standing on an alien landscape with two planets and a bright star in the background, and text "A Kash and Calyn Adventure C. William Tressler" at the bottom.
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Book cover of Disaster In Transport
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Book cover of The Nebula Royale. A Kash and Calynn Adventure
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Under a Crystal Moon Cover
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