TNG novels in the past few years have tended to be set between movies, eg post FC/pre INS, post INS/pre NEM and are now nearly all post-NEM.
Been a while since I made a pointless list, and besides, I was curious, so I went back to 1998 (the year
Insurrection was released, and also about when books commissioned after
First Contact would've been in full gear) to see how the
TNG novels break down:
Pre-series
Double Helix: The First Virtue by Michael Jan Friedman & Christie Golden (1999)
The Valiant by Michael Jan Friedman (2000)
The Buried Age by Christopher L. Bennett (2007)
Between "Encounter at Farpoint" and Generations
The Captain's Table: Dujonian's Hoard by Michael Jan Friedman (1998)
The Best and the Brightest by Susan Wright (1998)
Dyson Sphere by Charles Pellegrino & George Zebrowski (1999)
Double Helix: Infection by John Gregory Betancourt (1999)
Double Helix: Vectors by Dean Wesley Smith & Kristine Kathryn Rusch (1999)
Double Helix: Red Sector by Diane Carey (1999)
Double Helix: Quarantine by John Vornholt (1999)
The Forgotten War by William R. Fortschen (2000)
Tooth and Claw by Doranna Durgin (2001)
Do Comets Dream? by S.P. Somtow (2003)
Between Generations and First Contact
Triangle: Imzadi II by Peter David (1998)
Section 31: Rogue by Andy Mangels & Michael A. Martin (2001)
Slings and Arrows: A Sea of Troubles by J. Steven York & Christina F. York (2007)
Slings and Arrows: The Oppressor's Wrong by Phaedra M. Weldon (2007)
Slings and Arrows: The Insolence of Office by William Leisner (2007)
Slings and Arrows: That Sleep of Death by Terri Osborne (2008)
Slings and Arrows: A Weary Life by Robert Greenberger (2008)
Slings and Arrows: Enterprises of Great Pitch and Moment by Keith R.A. DeCandido(2008)
Between First Contact and Insurrection
The Q Continuum: Q-Space by Greg Cox (1998)
The Q Continuum: Q-Zone by Greg Cox (1998)
The Q Continuum: Q-Strike by Greg Cox (1998)
The Dominion War: Behind Enemy Lines by John Vornholt (1998)
The Dominion War: Tunnel Through the Stars by John Vornholt (1998)
Planet X by Michael Jan Friedman (1998)
Immortal Coil by Jeffrey Lang (2002)
The Battle of Betazed by Charlotte Douglas & Susan Kearney (2002)
Between Insurrection and Nemesis
I, Q by John deLancie & Peter David (1999)
Double Helix: Double or Nothing by Peter David (1999)
The Genesis Wave Book 1 by John Vornholt (2000)
Gemworld Book 1 by John Vornholt (2000)
Gemworld Book 2 by John Vornholt (2000)
The Genesis Wave Book 2 by John Vornholt (2001)
Diplomatic Implausibility by Keith R.A. DeCandido (2001)
Maximum Warp Book 1 by Dave Galanter & Greg Brodeur (2001)
Maximum Warp Book 2 by Dave Galanter & Greg Brodeur (2001)
Gateways: Doors Into Chaos by Robert Greenberger (2001)
The Genesis Wave Book 3 by John Vornholt (2002)
A Hard Rain by Dean Wesley Smith (2002)
Genesis Force by John Vornholt (2003)
A Time to be Born by John Vornholt (2004)
A Time to Die by John Vornholt (2004)
A Time to Sow by Dayton Ward & Kevin Dilmore (2004)
A Time to Harvest by Dayton Ward & Kevin Dilmore (2004)
A Time to Love by Robert Greenberger (2004)
A Time to Hate by Robert Greenberger (2004)
A Time to Kill by David Mack (2004)
A Time to Heal by David Mack (2004)
A Time for War, a Time for Peace by Keith R.A. DeCandido (2004)
Post-Nemesis
Death in Winter by Michael Jan Friedman (2005)
Resistance by J.M. Dillard (2007)
Q & A by Keith R.A. DeCandido (2007)
Before Dishonor by Peter David (2007)
Greater than the Sum by Christopher L. Bennett (2008)