Frank's journal and the dossier are some small, extra content things to add a little to the story. But they do add some depth and understanding to the characters so if you that tickles your fancy then be my guest.

  FRANK'S JOURNAL WILL CONTAIN SPOILERS (Will be added later)

  Unauthorized content usage: if you discover this narrative on Amazon, report the violation.

  It updates as the book updates, so if you are caught up then you're fine. Otherwise, don't read. The dossier however does not have spoilers. You can read it before you start the story if you want. Or just refer back to it if you are ever confused about a character and what they can do.