Kaiserreichfans Stories

This is a start of a book series that takes place over multiple dimensions were people make contact with others for an alternative world that is oddly close to theirs yet very different. Later on they have to work together to take on a threat to all their worlds. I based a lot of the 1938 world on the Kaiserreich lore from Hearts of Iron 4 so I give credit to Sarmatia who is the original creator of the Kaiserreich mod.