Jim dies in the prologue.  All he wants to do is stay dead, but unlucky for him, he's been resurrected and hired as a minion of a dread necromancer.  It's the best job he's ever had, but it's just not the same as being dead.

After a brief time enjoying his undead life, some bizarre angel-type creatures swoop in a start deleting everything, permanently eliminating the necromancer, the castle and all but him and 2 other undead, which is strange: until the Deleter attack, people are resurrected into new bodies when they die, and even the undead come back when they try to wipe themselves out,  Jim embarks on a quest to find these Deleters and have them eliminate him, too.  But maybe taking some time to be a hero instead of completely dead might, maybe, not be the worst thing in the world.

Yahtzee Croshaw is a video game journalist and this, his first novel, shows it.  It is deeply rooted in games, particularly World of Warcraft-style multi-user games.  Readers who play that kind of game regularly will recognize all the hallmarks of adventure games and quests, including their frequent resurrection

The book isn't perfect - you can see the big reveal coming from a mile away, but assuming you enjoy adventure games, it won't bother you much, even if it seems like we are supposed to be surprised.