System apocalypse LitRPG
Reading order for Shelter Keeper, taken from this catalogue. This is every Shelter Keeper title the catalogue lists.
Start here. Shelter Keeper: Apocalypse, book 1, is available. The Amazon page for that book has the store preview and the purchase link.
1
When the System arrives, handyman Caleb Reed gets a line on the ground around Fountain Square. Inside it, the glass hounds can't reach you. Outside, they can. Neighbors are counting on that line—and it isn't free.
2
Winter came early to the end of the world. Inside Caleb Reed's line, Brightwall is cold, hungry, and running out of time. Everyone believes the old fountain keeps them alive. Only Caleb knows what the light really costs.