I'm really enjoying an unusual LitRPG called The Daily Grind by Argus (book 1 on Kindle Unlimited, not Royal Road).

Most LitRPGs are set in fantasy or science fiction worlds, or a post-apocalyptic world, but The Daily Grind is about a guy who works a dead end phone support job finding a door to an endless dungeon in his office, but the dungeon is mostly endless cubicles, and most of the drops are skill orbs for mundane skills like gardening or musical history.

Really different take on the genre, which is refreshing!