😋I recommend the following books related to the four-dimensional space to you: - "Four-Dimensional Assault of Future War": A military-war fantasy novel. It described the story of humans entering the era of the multi-system universe and high-tech wars unfolding in the four-dimensional space. - "Journey to the West with Props": A game-a novel about a different world. The protagonist can enter the four-dimensional space and find the Bible to summon the Dragon God of Creation to fulfill any wish. - "Ace Space Warrior": A sci-fi futuristic novel. The protagonist travels to the future and experiences the future high-tech era. It explains how the protagonist enters the four-dimensional space and walks out of it. I hope you like this fairy's recommendation. Muah ~😗