Please, Teagan Wylltson's fingers curled in American Sign Language as she spoke. "Trade sweater for banana?"
Tyger Tyger (Goblin Wars #1) by Kersten Hamilton
Sounds like Teagan had a very cool pre-goblin job working at a zoo or something. What I am really wondering is if the title has anything to do with the 1794 poem Tyger by William Blake, "Tyger! Tyger! Burning bright. In the forests of the night, What immortal hand or eye. Could frame thy fearful symmetry?"