The "Shattering" saga represents everything from science fiction that I have always loved, combined in one massive web of interconnected series. These books and stories include everything from Kirby-esque cosmic space-gods to Warhammer 40K-esque massive colossus walkers and Baen-style futuristic military combat to Dune-style far-future universe-building with political and religious systems and hierarchies.
All of that, of course, is the tapestry against which our very (mostly) human heroes and their (human and alien and godlike) villains engage with one another, while the galaxy burns all around them.
The series stands at five novels and one novella thus far, as of summer 2015. Those works are included in the chart below.
Here's a quick and handy annotated overview of the "eras" of the Shattering saga's universe, along with where each of the existing (or soon to exist) books and stories fit into it.
This is therefore a chronological listing according to the internal timeline of the story.
(No real spoilers here. Spoiler details for the various books and stories have been omitted. This is intended as a general reference chart when attempting to place the various works in the proper order.)
(The age before Mankind goes into space)
FIRST PAX MACHINA
(Unexplained collapse of Pax Machina)
(Mankind gains limited interstellar space travel)
FIRST TERRAN EMPIRE
(Mankind colonizes and establishes the Seven Worlds)
(Mankind loses interstellar space travel)
FIRST DARK AGE
(Mankind regains interstellar travel)
(War among the Seven Worlds)
* Baranak: Storming the Gates (forthcoming)
SECOND TERRAN EMPIRE
(Collapse of Second Terran Empire)
(Rise of the Terran Alliance and the Outer Worlds)
* Lucian: Dark God's Homecoming
(Collapse of galactic civilization)
SECOND DARK AGE
(Rise of the Young Empires)
THE YOUNG EMPIRES
* Legion I: Lords of Fire
* The Legion Chronicles 1: Cold Lightning
* The Legion Chronicles 2: Red Colossus (forthcoming)
* Legion II: Sons of Terra
* Legion III: Kings of Oblivion
(The Twilight War)
SECOND PAX MACHINA
* Falcon: Revolt Against the Machine (forthcoming)
(The Great Revolt)
* Legion IV -- ? (forthcoming)
(The Shattering event)
* Hawk: Hand of the Machine
* Hawk 2 -- ? (forthcoming)
Next time I'll present a list based more on "order the stories were written/suggested reading order(s)."
You can find all these books (for the Kindle and in paperback and hardcover) at the White Rocket Books site: http://www.whiterocketbooks.com and on Amazon.com, or through your local bookstore.