D.K. Landtroop Books in Order

William survives an apocalypse only to discover a world governed by unfamiliar game-like rules and populated by new monsters. Learning a class and building shelter becomes essential, but protecting others will require turning an isolated refuge into a lasting fortress.

William's efforts to gather survivors and build a safe home face renewed upheaval as the transformed world changes again. New peoples may offer answers or become enemies, while the constant cost of his abilities forces him to keep learning and advancing.

After surviving a war and restoring an allied city, William faces new threats rising from the sea. Protecting the barony requires solving the resource demands of his abilities and making a decision that could alter every human life under his care.

After years ruling a magical realm, Kyle returns home in his teenage body with nearly all his powers gone. Family debts, school and unfamiliar enemies complicate readjustment, while signs of awakening magic suggest his homecoming may have damaged reality itself.

Kyle slowly regains his powers as dungeons appear and his friends develop abilities of their own. Preparing Earth for growing supernatural threats requires resources and allies, but approaching graduation and fractures within his circle make the task increasingly urgent.

Summoned to a fantasy world and bound to a giant oak, Mason receives the unusual class of Treehouse Master. Trapped without training or weapons, he must transform a crude shelter into a fortress while adapting goblins attack and the tree's importance remains unexplained.