Seconding (more fourthing?^^) the Hand of Thrawn Duology.

It has 2 of my 3 "Absolute Best Moments" in all Star Wars Novels in it, and continues the ...not so much plot but Theme of this trilogy without the "And then Thrawn Came Along and One Upped everybody".

Not gonna say more because of spoilers, and you should read that one as unspoilered as possible to enjoy it fully.

Maybe in a Thread on this site? ^^