This was an unexpected pleasure.
The Testament of Longinus evokes memories of religious texts I've read (by choice or not). There's That One Really Boring Book, and That Book Written On Psychedelic Mushrooms. The text repeats itself, contradicts itself, and changes tense and person for a chapter before reverting back ... not unlike many real texts.
Another nice touch is the use of footnotes by the supposed editors and translators. Not only do the footnotes add authenticity, the editors argue different interpretations IN THE FOOTNOTES, almost as if speaking to each other. Appendices by each elaborate his or her respective approach: one points out inaccuracies and contradictions as if to deconstruct it, another touts his theory of up to eight different authors, and a third defends his faith against the arguments of the other two.
This book adds depth to the Lancea Sanctum, provides a prop for a V:tM game when printed, AND is an amusing, if dark and morbid, read.
[4 of 5 Stars!]