The Beginning After the End: Publisher's Pack 2 contains books 3 and 4 of The Beginning After the End series. 

Beckoning Fates (book 3):

Was I taking this life for granted? Having this amount of power at my age had made me lose some of the sense of rationality I’d had in my former life. No longer a king, no longer tied down by rules and politics, I’d become careless. In this world, my potential was boundless.

Though Arthur Leywin would like nothing more than to pursue his studies at the esteemed Xyrus Academy, where he hopes to push his already potent magical abilities to new plateaus and perhaps discover something more about his reincarnation into this world, he finds the politics of the school’s halls even more challenging to navigate than those of the council chambers he once inhabited as King Grey. Arthur faces inept professors, jealous classmates, and an overeager director while fending off the affection of an old friend and the aggression of an old enemy. Then a routine class trip into a low-level dungeon turns out to be anything but, and Arthur discovers something that will change his life forever.

Horizon's Edge (book 4):

In my past life I hadn’t had anyone I would have given my life to protect. I had that now, but I didn’t have the strength to protect them - not against what was about to come.

In another life, Arthur Leywin was a king and no stranger to war. He was not ready, however, to find himself at the heart of a conflict that will reshape his entire new world. Despite his abilities, it seems as if the danger only increases with every discovery he makes. His oldest friend succumbs to a power that may destroy her, a power Arthur gave her. His most constant foe accepts a dark gift to challenge Arthur’s strength, an act that threatens all of Xyrus Academy. How can he keep his family safe if his very presence is the thing that draws danger to them? Can he dispel the specters of war before it is too late?