^That's not counting the post-Destiny books: A Singular Destiny, TNG: Losing the Peace, VGR: Full Circle/Unworthy, and TTN: Over a Torrent Sea & Synthesis (upcoming).
As for Articles of the Federation, I believe chronologically it begins shortly after book 2 of Titan, but there's no reason it has to be read in that order relative to Titan, since there's very little overlap. Books 1 & 2 of Titan are essentially a 2-parter and should be read back-to-back.