A thrilling tale about time travel, the medival period, infestations and, most importantly, about caring for others. In this book we follow two POVs/timelines: one in the medival time, following Kivrin as she learns about this time and the people in it, and one in present day / future time, were a disease of unknown origin starts to affect most people connected to the Oxford historians. Both were equally gripping and had interesting and diverse characters. The stylistic choice to to show Kivrin´s recordings and thereby provide a first person narrative within the book was phenominal and my favourite parts of the book. I very much enjoyed the writing style in general. Willis´ writing is very approachable and I think this is a book that can be enjoyed by different kinds of readers, since it includes elements of different genres. Yes, it´s a time travel story and therefore science fiction, but also a historical novel, an adventure story, maybe even a thriller.... The believable and sweet relationships between the characters I loved, as well as them interacting with the not so likeable characters, really made this story for me. It was easy to get emotionally invested, even if I didn´t cry at any of the sadder moments, they definetly affected me. I also felt that the outcome wasn´t predictable: The plot twist was spoiled for me since it was already revealed in the description at the back of my book, however, I wouldn´t have thought it would go exactly as it did. Also, the theories on time travel presented in this book were fresh and fascinating. Big recommendation to basically everyone. It becomes quit dramatic at times and it´s not really suitable as a cozy read I guess, but the way it was written kept it from becoming depressing and too packed. Now I´m kind of interested in learning more about the 14th century and that´s always a good thing.