Babylon 5 Book #7 - The Shadow Within (11/2256 - 01/2257)
Babylon 5 Book #9 - To Dream in the City of Sorrows (Marcus in 10/2260, recalling events of 1/2259-9/2260)
Dark Genesis - The Birth of the Psi Corps (2115-2189)
Deadly Relations - Bester Ascendant (2189-2258)
Final Reckoning - The Fate of Bester (2271-2281)
Legions of Fire - Book I - The Long Night of Centauri Prime (2262-2266)
Legions of Fire - Book II - Armies of Light and Dark (2266-2273) Peter David made a date error in the books. Dec. 14, 2267 should be Dec. 14, 2266.
Legions of Fire - Book III - Out of the Darkness (2274-2278) All dates after that are off by 1 year. You need to subtract 1.
The Passing of the Techno-Mages - Book I - Casting Shadows (11/2258-12/31/2258)
The Passing of the Techno-Mages - Book II - Summoning Light (1/2259-2/2259)
The Passing of the Techno-Mages - Book III - Invoking Darkness (8/2260-2261)
Note: The TV series "Babylon 5" chiefly takes place from 2258 to 2262.