I, however, argue with this. Since TNG is absolutely finished (there won't even be anymore books, I'm told),
You were lied to.
The book 'Path of Disharmony' (TNG) by Dayton Ward is set to be released later this year under Star Trek: Typhon Pact
banner. Also, 'Seize the Fire' (Star Trek: Titan) by Michael A. Martin is set to be released as well featuring Riker, Troi and several minor TNG characters under the same banner.
The TNG characters are alive, well and still being published by Pocket Books for the forseeable future.