My version of the post-TMP continuity includes Ex Machina, Mere Anarchy: The Darkness Drops Again
, and parts 2-3 of DTI: Forgotten History
. It is compatible with or makes reference to The Covenant of the Crown
and The Better Man
by Howard Weinstein, The Kobayashi Maru
by Julia Ecklar, and The Captain's Daughter
by Peter David (which is mostly post-TUC but includes portions set in the pre- and post-TMP eras). So you can treat those as a more-or-less consistent post-TMP continuity if you like.
But there are a good number of other novels that offer different takes on the era -- usually ones that hew closer to TOS or TWOK and make little use of the specific elements of TMP.