To continue the saga of DSN and Bashir, I'd say read the DSN Relaunch in the editorially-intended order. In later years, the DSN novels and other series began to mix a bit under newer headings, so I'd include them. Bolded are books with a special Bashir focus.
To wit:
- The Lives of Dax ed. Marco Palmieri
- A Stitch in Time by Andrew J. Robinson ("Elim Garak")
- Avatar, Book One by S.D. Perry
- Avatar, Book Two by S.D. Perry
- Section 31: Abyss by Jeffrey Lang and David Weddle (former DSN staff writer)
- Gateways: Demons of Air and Darkness by Keith R.A. DeCandido
- "Horn and Ivory," from Gateways: What Lay Beyond, by Keith R.A. DeCandido
- Twilight (Mission: Gamma, Book I) by David R. George III (former VOY freelance writer)
- This Gray Spirit (Mission: Gamma, Book II) by Heather Jarman
- Cathedral (Mission: Gamma, Book III) by Michael A. Martin and Andy Mangels
- Lesser Evil (Mission: Gamma, Book IV) by Robert Simpson
- Rising Son by S.D. Perry
- The Left Hand of Destiny, Book One by J.G. Herzler ("Martok") and Jeffrey Lang
- The Left Hand of Destiny, Book Two by J.G. Herzler and Jeffrey Lang
- Unity by S.D. Perry
- Worlds of Star Trek: Deep Space Nine, Vol. I
Cardassia: The Lotus Flower by Una McCormack
Andor: Paradigm by Heather Jarman
- Worlds of Star Trek: Deep Space Nine, Vol. II
Trill: Unjoined by Michael A. Martin and Andy Mangels
Bajor: Fragments and Omens by J. Noah Kym
- Worlds of Star Trek: Deep Space Nine, Vol. III
Ferenginar: Satisfaction is Not Guaranteed by Keith R.A. DeCandido
The Dominion: Olympus Descending by David R. George III
- Warpath by David Mack (former DSN freelance writer)
- Fearful Symmetry by Olivia Woods
- The Soul Key by Olivia Woods
- The Never-Ending Sacrifice by Una McCormack
- Destiny by David Mack (big TNG/DSN/VOY/ENT crossover; placing it here rather than after Soul Key is arbitrary but works)
Gods of Night
Mere Mortals
Lost Souls
- A Singular Destiny by Keith R.A. DeCandido (more a cross-series novel, but heavy DSN supporting characters element)
- Typhon Pact: Zero Sum Game by David Mack
- Typhon Pact: Rough Beasts of Empire by David R. George III
- Typhon Pact: Paths of Disharmony by Dayton Ward (technically probably more of a TNG novel, but has a major DSN "guest star" and carries a major DSN arc forward)
- Typhon Pact: Plagues of Night by David R. George III
- Typhon Pact: Raise the Dawn by David R. George III
- Typhon Pact: Brinkmanship by Una McComack (evenly TNG and DSN)