Re: Books simillar to Articles of the Federation and Singular Destiny
I would suggest the last three Typhon Pact novels. Plagues of Night and Raise the Dawn by David R. George (be aware they can be tedious in their pacing) and Brinkmanship by Una McCormack.
All of which are worth reading, but there's nothing quite like Articles and Singular for political stories, more's the pity.
Soon oh soon the light, Pass within and soothe this endless night, And wait here for you, Our reason to be here...