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Contact: Echoes in the Dark: Hard Science Fiction Best Value 
The Receiver: A Hard Sci-Fi First Contact Techno-Thriller Independently published 
The Shackleton Signal: Hard SF Thriller 
The Oracle (First Contact) 
Exodus (The Exodus Trilogy Book 1) 
The Object: Hard Science Fiction 
Ascending Carbon: Prologue to the Series (Ascending Carbon Series) Hard-SF.com The Frozen Planet: Hard Science Fiction (The Marchenko Logfiles Book 2) Hard-SF.com The Dead Planet: Hard Science Fiction (The Marchenko Logfiles Book 4) Quartermaster Press Darwin's Dilemma: A Metaphysical Hard Sci-fi AI Technothriller Hard-SF.com The Atacama Incident: Hard Science Fiction Echoes of Time: A Science-Fiction Thriller (Epic of Atlantis Book 1) Hard-SF.com The Enceladus Mission: Hard Science Fiction (Ice Moon Book 1) A7L Thrilling Books Limited The Genesis Signal: Science Fiction Thriller Exodus Blue: A Posthumanism Hard Science Fiction Novel with AI and Mystery (The Colour of Blood Book 1) Pygmalion Media Generations: A Science Fiction Mystery Thriller Xenophile Press Oblivion Threshold: A Military Science Fiction Space Opera Epic (The Oblivion Saga Book 1) Hard-SF.com The Torn Planet: Hard Science Fiction (The Marchenko Logfiles Book 1) Primordial Press Primordial Threat: A Hard Science Fiction Thriller (The Exodus Series Book 1) Uphill Downhill Press, LLC Wine Dark Deep: A Hard Science Fiction Space Opera - Book One Sentient Vessels: Hard Sci-Fi Ship Diaries from Deep Space The Europa Sequence: A Hard Science Fiction Short Story of First Contact and Survival Exemplar: Hard Science Fiction: The Autonomous Sequence (Book 1) Hard-SF.com The Shared Planet: Hard Science Fiction (The Marchenko Logfiles Book 3) Carpathians Hard-SF.com The Disturbance: Hard Science Fiction Hard-SF.com The Luna Monolith: Hard Science Fiction (The Black Monolith Book 1) Yesterday's Thief: An Eric Beckman Paranormal Sci-Fi Thriller Primordial Press Freedom's Last Gasp: A Hard Science Fiction Thriller (The Exodus Series Book 2) Vinci Books The Visitor: First Contact Hard Science Fiction Cosmic Entanglement Media The Foundry: A Hard-Science Fiction Space Opera (Book 1) Green Hill Publishing Homo Machina: A Post-Apocalyptic Hard Sci-fi Genetic Engineering Thriller Aethon Books The Weapon: Books 1-3: A Military Sci-Fi Series Epic Realms Press Lost Planet (Starship of the Ancients Book 2): A Space Opera Adventure Futureword Publishing Blue SunRise: A Riveting Character-driven Hard Sci-fi Adventure (Blue Sun Space Opera Book 1) The Second Human Extinction Event: Will The Sun Rise or Set On Humanity? BEYOND PROXIMA CHRONICLES BOOK ONE: THE LAST MIGRATION: A Hard Science Fiction Novella The Mars Anomaly: Hard Science Fiction Hard-SF.com The Hole: Hard Science Fiction (Solar System Series Book 1) Hard-SF.com The Triton Disaster: Hard Science Fiction (Solar System Series Book 4) Hard-SF.com Andromeda: The Encounter: Hard Science Fiction (The Long Journey Book 1) J Triptych Publishing Visitor: A Hard Sci Fi Thriller (Transcendence Book 1) Science Fiction Books Phantom 500: A Hard Science Fiction Space Opera Epic (The Origin Series Book 1) The Wooden Pen Press Venusian Uprising - A Military Hard Science Fiction Epic (Aeon 14 - The Sol Dissolution Book 1) Instrumental: Hard Science Fiction: The Autonomous Sequence (Book 2) Hard-SF.com The Clouds of Venus: Hard Science Fiction (Solar System Series Book 5) We Were Here First: An Alternative History Space Race Novella (From Apollo's Ashes Book 1) Endeavour (A Sleeping Gods Novel Book 1) A Hard Reset (The System Integration Chronicles Book 1) CYI Publishing MY DIGITAL SOUL: A Genre-Bending Hard Science Fiction/Mythological Horror Novel The Breakthrough Effect: A Science-Fiction Thriller Anthem Press No Way Home: A Lost Starship Sci-Fi Adventure: (A Standalone Novel) (Scott Standalones) Aethon Books The Eighth Continent: A Hard Science Fiction Thriller Hard-SF.com The Luna Monolith 2: Hard Science Fiction (The Black Monolith) Tachyon: The Weapon: Hard Science Fiction Hard-SF.com The Portal: Hard Science Fiction (Portal to Xibalbá Book 1) Hard-SF.com The Titan Probe: Hard Science Fiction (Ice Moon Book 2) Hard-SF.com The Luna Monolith 3: Hard Science Fiction (The Black Monolith) Hard-SF.com The Rift: Hard Science Fiction (Solar System Series Book 3) Hard-SF.com The Portal 2: Hard Science Fiction (Portal to Xibalbá) Hard-SF.com The Bastion of God: Hard Science Fiction (The Dark Cloud Book 2) The Rift: A Science-Fiction Thriller Hard-SF.com The Disturbance 2: The Answer: Hard Science Fiction Hard-SF.com The Factory of God: Hard Science Fiction (The Dark Cloud Book 1) The Meteor: Science Fiction Thriller Hard-SF.com Proxima Rising: Hard Science Fiction (Proxima Trilogy Book 1) Hard-SF.com Proxima Trilogy: Part 1-3: Hard Science Fiction Hard-SF.com The Disturbance 3: The Truth: Hard Science Fiction Hard-SF.com The Krill Enigma: Hard Science Fiction Wilderness Five: Hard Science Fiction (Metamorphosis Book 1) Hard-SF.com The Dark Spring: Hard Science Fiction (Solar System Series Book 6) Hard-SF.com Mars Nation 2: Hard Science Fiction (Mars Trilogy) Hard-SF.com The Pluto Debacle: Hard Science Fiction (Solar System Series Book 8) A. Nation Books Fatal Error (A Blackhawk Detective Mystery, Book 7): Death by Innocence - A Hard Science Fiction - An Android's Sentienc Hard-SF.com The Jupiter Catastrophe: Hard Science Fiction (Ice Moon Book 5) Hard-SF.com Return to Enceladus: Hard Science Fiction (Ice Moon Book 4) The Wooden Pen Press Lyssa's Dream - A Hard Science Fiction AI Adventure (The Sentience Wars Book 1) War of A.I: A Hard Science Fiction Thriller From The Future (Beyond Secret Book 1) Hard-SF.com Amphitrite: The Black Planet: Hard Science Fiction (Planet Nine Book 1) The Fossil: Science Fiction Thriller (Secrets Of Mars Book 1) -
Hardcore Henry Hard-SF.com Mars Nation 3: Hard Science Fiction (Mars Trilogy) The Wooden Pen Press Storming the Norse Wind - A Hard Military Science Fiction Assault (Aeon 14: Origins of Destiny) Hard-SF.com Proxima Dying: Hard Science Fiction (Proxima Trilogy Book 2) Hard-SF.com The Beacon: Hard Science Fiction (Solar System Series Book 7) Hard-SF.com Silent Sun: Hard Science Fiction (Solar System Series Book 2) -
Settlers The Fossil 2: Science Fiction Thriller (Secrets Of Mars Book 2) Hard-SF.com Andromeda: The Sojourn: Hard Science Fiction (The Long Journey Book 2) Keith McIntosh Oberon's Calling: The Birth of Nick Jones: A Science-Fiction Action Thriller (The Nick Jones Saga Book 1) Hard-SF.com The Io Encounter: Hard Science Fiction (Ice Moon Book 3) Hard-SF.com The Death of the Universe: Ghost Kingdom: Hard Science Fiction (Big Rip Book 2) Hard-SF.com The Wall: Eternal Day Hard-SF.com Andromeda: The Arrival: Hard Science Fiction (The Long Journey Book 3) Infinivox The Year's Top Hard Science Fiction Stories 7 Hard-SF.com The Uranus Fiasco: Hard Science Fiction (Solar System Series Book 9) Hard-SF.com The Death of the Universe: Hard Science Fiction (Big Rip Book 1) Hard-SF.com Proxima Dreaming: Hard Science Fiction (Proxima Trilogy Book 3) -
Godzilla Evolved The Wooden Pen Press Lyssa's Run - A Hard Science Fiction AI Adventure (The Sentience Wars Book 2)