Brood Mother - Gryphonpike Chronicles, #5

The mute elven archer known only as Killer. Azyrin, a half Winter-orc shaman and his human swordswoman bride, Makha. Drake, the charming, swashbuckling rogue. The fireball-slinging pixie-goblin, Rahiel, and her mini-unicorn, Bill. These are the Gryphonpike Companions. Arriving in Ramsport, Killer and her companions find a city under siege by a swarm of dragons. Banding together with other adventurers from their Guild, they set off to find the source of the swarm.
But as they sail down the Verdant Coast, Killer begins to suspect those around her are not as forthright they appear. and that soon dragons will be the least of her problems. This is the fifth adventure novella in the Gryphonpike Chronicles series.