An early positive review and an interesting phrase within.

[MGWSpike]

Spoiler:

Konami's been neglecting it forever - and now they're using words like "canon"?   I think it's a lock for Volume 3.

Spoiler:

San Hieronymo is mentioned at the beginning of Peace Walker, Portable Ops screenshots are used in MGS4 and Kojima did say the events of the game happened in broad strokes. He only wrote the synopsis for MPO: the script is attributed to Gakuto Mimo, a light novel author. Kojima reportedly didn't like certain elements in the final version, for example Null being revealed as Gray Fox.