パスファインダーRPG
Gladstone is to write a "Pathfinder Roleplaying Game" tie-in novel for Paizo Publishing. Since 2016 he is also part of the team of writers working on George R. R. Martin's "Wild Cards" anthology series. "The Highway Kind", a fantasy road trip novel, was announced for publication in 2018 by Tor Books but has not yet seen print. Gladstone's novel "Empress of Forever," a space opera, was published in 2019.