The firenewt appeared in the second edition for the Forgotten Realms setting in the first Monstrous Compendium Forgotten Realms Appendix (1989), and was reprinted in Monstrous Compendium Annual Volume Three (1996). The firenewt was further detailed in Dragon #257 (March 1999) in "The Ecologies of the Firenewt & Giant Strider: Hammer & Anvil".
Firenewts are carnivores who prefer to dine on the flesh of humans and other humanoids, though they will also eat herd animals.
- Turnbull, Don, ed. Fiend Folio (TSR, 1981)
- Conners, William, et al. Monstrous Compendium Forgotten Realms Appendix (TSR, 1989)
- Pickens, Jon, ed. Monstrous Compendium Annual Volume Three (TSR, 1996)
- Wyatt, James and Rob Heinsoo. Monstrous Compendium: Monsters of Faerûn (Wizards of the Coast, 2001)
- Greenwood, Ed, Eric L. Boyd, and Darrin Drader. Serpent Kingdoms. Renton, WA: Wizards of the Coast, 2004