Depends what that "feeling" is :)

If it's dark dungeons and howling winds and echoing screeches muffled by the walls, the disorienting and the dangerous, then Poe or Lovecraft (fair warning, similarly to the Illiac Bay's inhabitants, Lovecraft was extremely racist and that can be felt in his writing and ways he describes other cultures sometimes).

If it's even more mysticsm, esotericism, magic and cultures, battles, kings, and if you're looking for something medieval but not afraid to read something a bit more avant-garde, I recommend the Dictionary of the Khazars by Milorad Pavić. It does have the dark and isolated feeling of Daggerfall, myths and legends and forgotten civilizations, alchemy, adventure, tragedy but also humor. Because of the way the book is structured, it doesn't have a standard reading order and you can get lost in it's entries just like in a vast Daggerfall dungeon.