The Umbra Signal > Editions

by David Williams

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The Umbra Signal (Kindle Edition)

Published July 31st 2025

Kindle Edition, 584 pages

Author(s):

David Williams (Goodreads Author)

ASIN:

B0FHJCZH76

Edition language:

English

Average rating:

4.47 (15 ratings)

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The Umbra Signal: A Cipherlock™ Thriller (Paperback)

Published July 31st 2025 by Independently published

Paperback, 582 pages

Author(s):

David Williams NY

ISBN:

9798292527336

ASIN:

B0FHWCB83Z

Edition language:

English

Average rating:

5.00 (1 rating)

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