The voynich manuscript
Is a voyage manuscript that allows the reader to grow a plant for the purpose of time travel. This plant is a root based plant. The book is written in a medical derivative of Latin. This book's primary purpose is to give birth to Cathar souls. Cathar souls are souls that are waiting to be born. Humans are able to be birthed through plants. They come out like miniature adults and they grow to full human size.
It's a nydus canal that allows for interdimentionary space travel