From Halopedia, the Halo wiki
Negotiations (#1 • #2 • #3)
Spirit of Fire (#4 • #5 • #6)
The Fall of New Phoenix (#7)
The Next 72 Hours (#8 • #9 • #10)
Exposure (#11 • #12)
The Janus Key (#13 • #14 • #15 • #16)
The Glass Horizon (#17 • #18)