If anyone cares, this is how it breaks down:
1998: 2
Gargantua
Spider-Man: Venom's Wrath
1999: 3
Buffy the Vampire Slayer: The Xander Years Volume 1
Young Hercules: Cheiron's Warriors
Young Hercules: The Ares Alliance
2000: 0
2001: 3
Star Trek: The Next Generation: Diplomatic Implausibility
Farscape: House of Cards
Star Trek: Deep Space Nine: Demons of Air and Darkness
2002: 2
Star Trek: The Brave and the Bold Book 1
Star Trek: The Brave and the Bold Book 2
2003: 5
Darkness Falls
Gene Roddenberry's Andromeda: Destruction of Illusions
Star Trek: The Lost Era: The Art of the Impossible
Star Trek: I.K.S. Gorkon Book 1: A Good Day to Die
Star Trek: I.K.S. Gorkon Book 2: Honor Bound
2004: 4
Dragon Precinct
Resident Evil: Genesis
Resident Evil: Apocalypse
Star Trek: A Time for War, a Time for Peace
2005: 5
Ferenginar: Satisfaction is Not Guaranteed (in Worlds of Star Trek: Deep Space Nine Volume 3)
Star Trek: I.K.S. Gorkon</i> Book 3: Enemy Territory
Star Trek: Articles of the Federation
Serenity
Spider-Man: Down These Mean Streets
2006: 3
World of Warcraft: Cycle of Hatred
Buffy the Vampire Slayer: Blackout
StarCraft: Ghost: Nova
2007: 6
The Mirror-Scaled Serpent (in Star Trek: Mirror Universe: Obsidian Alliances)
Buffy the Vampire Slayer: The Deathless
Command and Conquer: Tiberium Wars
Supernatural: Nevermore
Resident Evil: Extinction
Star Trek: The Next Generation: Q & A
2008: 4
Star Trek: Klingon Empire: A Burning House
CSI: NY: Four Walls
A Gutted World (in Star Trek: Myriad Universes: Echoes and Refractions)
Supernatural: Bone Key
2009: 2 (so far)
Star Trek: A Singular Destiny
Mack Bolan, Executioner: Code of Honor
2010: 2 (so far)
StarCraft: Ghost: Spectres
Mack Bolan, Executioner: Caribbean Queen