---read Kiki Strike (which you probably already did!)
---Visit International Mastermind's blog
---Random Irregular's blog
---Invisable Turtle's blog
Kiki Strike books have evrything in them.
International Mastermind has very good info, that everybody should read.
Random Irregular has very useful info on going on missions.
Invisible Turtle has info on evesdropping/spying.
just in case someone's still looking for a reliable source.