It's not an "agenda book", it might even be described in some stretches as somewhat sympathetic/pragmatic to the regime, but it's a very thorough and very well written history of Saudi Arabia and analysis of its current (as of 2009) situation - politics, economics etc. Wikipedia states (unsourced) that it has "been cited as standard study texts for the diplomatic community working inside the Kingdom of Saudi Arabia", but I can believe it.
https://en.wikipedia.org/wiki/Sleeping_with_the_Devil
Also the excellent Adam Curtis BBC documentary Bitter Lake - which is probably the best thing I've watched in the last year:
https://en.wikipedia.org/wiki/Bitter_Lake_%28film%29