Small correction - the Spoo stuff is canon, as that one was from the lips of JMS himself.
Much of the rest is at least halfway usable - the alien festivals are nice to have for BG for example, but the "fact" that the EA post office closes for all the listed festivals is just ridicolous, and should be treated as bullshit.
Also there are other nice bits of info - from the alien matrial arts style names over the list of dangerous creatures to banned entertainment (X-files - banned by the Vree as "offensively truthful"... ROTFL). And BG-fluff stuff like the "sector numbers" are also nice for fleshing out gameplay, even though they make about as much sense as Star Trek's "magic particle of the week™"... :lol:
The pictures are really nice, true, though some descriptions have to be treated with care (like the one on P.-101, calling the Centauri Vorchan/Demos warships "Fighters" - for a size comparison between those hulls and fighters, watch Lennier's actions in S-5, when he docks his Niall to such a vessel).
And then there's the complete bullshit... from lumati fruits destroying the ozone layer (theoretically possible, but not in that time period) to the vorlon equivalent of swedish meatballs (as if someone has EVER seen vorlons at dinner on their homeworld). Or the Psi-Corps info, which contradicts stuff from the show (like that a P-4 could be trained into a P-5, when Bester said to Lyta a teep Always keeps his rating... of that the Corps doesn't require low-level teeps to join, when we know fron Ivanova's case it does...).
All in all it's a book that's nice to have, but should be used with care and caution. Always think twice about any info from the SecManual... (though some makes nice disinformation to screw with your players mind...) :wink: