David Williams's Blog: Reedsy 5-STAR Celebration - Posts Tagged "thriller"

Big news this week — The Umbra Signal has officially been featured on Reedsy Discovery’s “Best Science Fiction Books” list for October 2025! It’s been an incredible ride so far, with 107 reader upvotes and a glowing 5-Star MUST READ review from Reedsy reviewer Gordon A. Long.

📖 View the live feature on Reedsy

This recognition means a lot. The Umbra Signal was built from years of real science, Cold War research, and a deep fascination with time and meaning — so to see it connect with serious readers on Reedsy has been both humbling and thrilling.

To celebrate, we’ve reduced the Kindle eBook price from $5.99 to $3.99 through Friday, October 10, exclusively for the Goodreads and Reedsy communities.

📘 Get The Umbra Signal on Amazon

🎬 Explore the CipherLock™ Universe on YouTube

You can now dive deeper into the world of The Umbra Signal through short cinematic teasers and behind-the-scenes clips on the CipherLock Press channel:

🎥 CipherLock Press on YouTube

Each video brings scenes, characters, and concepts from the book to life — from Cold War transmissions to quantum memory experiments.

Thank you to everyone who’s read, upvoted, reviewed, or shared The Umbra Signal. Every reader helps keep this journey alive as we move toward the next installment in the CipherLock Sci-Fi™ Trilogy.

Stay curious — and watch the signal.

— David Williams
Author, The Umbra Signal
View the Reedsy Review

⚡️ 3-Day Flash Sale – Just 99¢! ⚡️



“The signal wasn’t from space. It was a warning.”



When a SETI analyst decodes a mysterious transmission, he uncovers a secret buried since the Cold War — one that could erase humanity’s past to protect its future.



The Umbra Signal is a Cipherlock™ science fiction thriller blending quantum mystery, espionage, and time-bending suspense into one cinematic experience.



Readers of Blake Crouch, A.G. Riddle, and Michael Crichton are calling it “smart, cinematic, and hauntingly original.”



📖 580 pages of immersive, high-concept storytelling.
💥 Only 99¢ until October 16!



Get it here:
👉 Amazon (U.S.)
👉 Amazon (U.K.)

Hello all -

SOrry for the delay; busy yeard end! I wanted to share that we just found out that that The Umbra Signal was named a
2025 American Writing Awards Finalist — Science Fiction.



...We will be running another giveaway very soon to celebrate! Hit me up if you want to have inside info as to when!

David Williams