Hmm, yeah, Vol. 1 ended in '88 and Vol. 2 began in '89. Granted, novels take longer to publish, but I doubt the discrepancy would be more than a few months.
I've never found a print-out, but I do recall the preliminary blurb for "The Captains' Honor" being announced on GEnie, and it suggested the kzinti, ie. of "The Slaver Weapon" (TAS), would be featured:
That book came out in September 1989.
Both the kzinti and the M'Dok are similarly described by Trek as "carnivorous felinoids, defeated and demilitarized by the Federation in war 200 years earlier".