okay okay okay but HOW exactly. how exactly did john kill Emily and Parker. he was trapped in the book. Emily was described to have been mutilated!!! in a fucking field!!! and when parker died there was no blood! did john take over arthur's body for a brief second? why has arthur never questioned it? how the hell was that possible

when kayne said "anyone who wouldve opened that book and taken what you took wouldve died. they all die." did he mean that?? cause per intermezzo other arthurs manage fine despite not being SpecialTM like our arthur. and WHY were they killed in such different ways??