This book really reminded me of The Illuminae Files by Amie Kaufman and Jay Kristoff. Only these files take place on Earth.
I love how mythology and religion is interwoven in the found objects. The characters are well defined though I thought that the love triangle was a bit unnecessary. However, that is probably because I have read about some many love triangles that I am tired of that plot device. As for the audiobook, it has a full cast which, I think, is so awesome. Every character has their own voice which works very well here because most of the files are interviews or other recorded conversations. Overall, I loved this book and I cannot wait until the sequel comes out.