Andy Weir - "The Martian"

Charles Stross - "Accelerando"

Daniel Suarez - "Daemon"

David Brin - "Sundiver"

Dennis E Taylor - "We Are Legion We Are Bob"

John Sandford - "Saturn Run"

Fred Hoyle - "The Black Cloud"

Gregory Benford, David Brin - "Heart of the Comet"

Greg Egan's "Schild's Ladder", "Axiomatic", "The Clockwork Rocket", etc.

James P Hogan - "Inherit the Stars"

Kim Stanley Robinson (KSR) - Mars Trilogy, "Aurora"

Larry Niven and Jerry Pournelle - "Footfall"

localroger's "Passages in the Void" series.

Octavia Bulter - "Lillith's Brood"

Paul J McAuley - "The Quiet War"

Poul Anderson - "Tau Zero"

Peter Watts - "Blindsight"/"Echopraxia", "Rifters"

Robert L. Forward - "Starquake"/"Dragon's Egg"

Rosemary Kirstein - "The Steerswoman's Road"

Robert Zubrin - "First Landing"

Simon Funk - "AfterLife"

Steve Perry - "The Man Who Never Missed"

Stephen Baxter - "Titan"

Stanislaw Lem - "His Master's Voice"

Ted Chiang - "Exhalation" "Understand" and all his other shorts.

Tobias Buckell - "System Reset"

Vernor Vinge - "Rainbows End"

William R Forstchen - "One Year After"

_____________________


Daniel Suarez' "Daemon" is a near future information tech scifi that manages to dig deep into IT concepts without ever once making obvious mistakes with jargon or concepts.

Greg Egan's "The Clockwork Rocket" series is not hard scifi for our universe but it is hard scifi for another. He backs up his setting with hard math as always and the plot is exciting.

Gregory Benford and David Brin's "Heart of the Comet" is about colonizing Haley"s comet the next time it passes through the inner system. It is hard enough scifi it was actually the only published work that predicted the color and shape of the comet"s coma before it entered the inner system in the 1980s. The way it's characters use computers and communications stands the test of time and seems modern even today.

KSR's recent "Aurora" is a very hard scifi take on the problems usually skipped over in slower-than-light generation ship travel.

localroger's "Passages in the Void" series is hard scifi about AI/machine assisted human colonization of exoplanets and moons after ecological disaster causes the extinction of humans on Earth.

Rosemary Kirstein's "The Steerswoman's Road" isn"t hard scifi in the traditional sense because characters have fantasy concepts like magic and wizards. But the characters" dialog and reasoning reads like hard scifi. In addition the prose is very good. A goodreads comment suggested imagining the setting as lifetimes after a failed human terraforming of an alien planet with society having forgotten technology and reverted to barbarism. The characters are completely ignorant of technology but they are very intelligent. So you get these sequences of xkcd simple explanations of common technologies that never use the modern words. Instead the characters use jargon more associated with "magic". The fun part is trying to guess which real scientific concept is being described.

Simon Funk's "Afterlife" is a perfect implementation of human consciousness uploading and the subsequent singularity that results. It uses extensive neuroscience and IT concepts with precision.

Stanislaw Lem's "His Master's Voice" is one of the rare few hard scifi books where the main characters and story are actually about science and the process of it rather than just involving technology.