Book #1 & #2 - Broken Clocks & Amber Threads

I'm counting this as reading 2 books.  The printed version has 829 pages.

Janon Tane finally makes his move. But no one anticipated how utterly prepared he was to tear Persephone and Piper’s lives apart to get what he wants. Now their world is crumbling around them and it seems Tane will stop at nothing to possess the third Hand, even if it means risking the end of the cycle to do it.

Worse still, the shadows of Gispuknya have returned to destroy the Hands forever. As a three-way war brews between Tane, Gispuknya and the Ahns, Seph and Piper must seek out the Keeper’s three trials and unlock the gates of Tartarus. 

But the journey won’t be easy. The rules that govern the cycle are unraveling. Everyone is cheating. And soon nothing is as it seems. Can they reach the nexus within Tartarus and awaken the Architects before everything falls apart forever? Or will this be the final universe?