The Next--the hyper-intelligent post-humans--realize that the missive they received from the center of the galaxy contains instructions for kick-starting the development of an immense artificial intelligence knows as The Machine. But to build this computer the size of an Earth continent, they must obtain help from the more populous and still industrious worlds of mankind.

"The Coast Guard must prevent the first lunar war in history. A lifelong Search-and-Rescuewoman, Coast Guard Captain Jane Oliver is ready for a peaceful retirement. But when tragedy strikes, Oliver loses her husband and her plans for the future, and finds herself thrust into a role she's not prepared for. Suddenly at the helm of the Coast Guard's elite SAR-1 lunar unit, Oliver is the only woman who can prevent the first lunar war in history, a conflict...

One hundred years before Ender's Game, the aliens arrived on Earth with fire and death. Earth Afire by Orson Scott Card and Aaron Johnston is the story of the First Formic War.
Victor Delgado beat the alien ship to Earth, but just barely. Not soon enough to convince skeptical governments that there was a threat. They didn't believe that until space stations and ships and colonies went up in sudden flame.
And when that happened,

...

Stranded on the moon after his extraordinary airplane takes him into outer space, a boy meets a marooned young Martian with a broken spacecraft, and the two new friends work together to return to their respective homes.

Told in separate voices, eighteen-year-old Tyler Jones, top graduate of Aurora Academy, and a group of misfits and troublemakers embark on their first mission with Auri, a stowaway from the distant past.

"Trapped aboard the Undying's ancient spaceship and reeling from what they've learned there, scavenger Mia and academic Jules are plunged into a desperate race to warn their home planet of the danger humanity's greed has unleashed"--

Leviathan Wakes is James S. A. Corey's first novel in the epic New York Times best-selling series The Expanse, a modern masterwork of science fiction in which humanity has colonized the solar system. Two hundred years after migrating into space, mankind is in turmoil. When a reluctant ship's captain and washed-up detective find themselves involved in the case of a missing girl, what they discover brings our solar system to the brink of civil war...

The behavioral psychologist onboard a survey ship headed to a planet ripe for colonization, Dr. Grace Park must determine the origin of a strange phenomenon that is causing the crew to suffer mental breaks without losing her own mind in the process. Psychologist Dr. Grace Park is on the Deucalion, a survey ship headed to an icy planet in an unexplored galaxy. She is to observe the thirteen human crew members aboard the ship as they assess the colonization...

Our heroes are back. Kind of. First, the bad news: an ancient evil - you know, your standard consume-all-life-in-the-galaxy deal - is about to be unleashed. The good news? Squad 312 is standing by to save the day. They've just got to take care of a few small distractions first. Like the clan of gremps who'd like to rearrange their favourite faces. And the cadre of illegit GIA agents with creepy flowers where their eyes used to be, who'll stop at nothing...

A coalition of Earth's nations barely fought off the Formics' first scout ship. Now it's clear that there's a mother-ship out on edge of the system, and the aliens are prepared to take Earth by force. Can Earth's warring nations and corporations put aside their differences and mount an effective defense? Ender's Game is one of the most popular and bestselling science fiction novels of all time. The Formic War series (The First Formic War and The Second...