The Voyage of the Forgotten (The Legacy of mode the Mercenary King) by Nick Martell

Michael Kingman has discovered his destiny, but the distance to what he wants, namely a life with Serena, the queen of Hollow kingdom, is as wide as the world, and just as cruel.

Meanwhile, Dark, the realms most fearsome mercenary, Michaels sometime mentor, and son of his nemesis, Angelo, is trying to keep Michael in line, for his own purposes as he too has a hidden agenda. Michael comes to realize that he is outclassed by powers that have been working for centuries to bring about a fresh end to the world filled with those he loves. But when has merely being overpowered ever stopped Michael from getting what he wants?

To prevent what may bring about the end times Michael must gather his remaining allies and push himself to achieve the impossible because the alternative is worse than he can imagine: its not just the beginning of the end of the world, its being alone and forgotten.

In this epic conclusion to a "master class in grand-scale storytelling" (Kirkus Reviews), The Voyage of the Forgotten brilliantly wraps up the stories fans have fallen in love with as the characters struggle against odds that seem impossible to overcome.