There is also 5 part Witcher Saga - five novels:
- Blood of Elves
- Times of Contempt
- Chrzest Ognia
- Wieża Jaskółki
- Pani Jeziora
Written like that, because AFAIA, indeed only first two are translated to english so far.
There is only literally one sentence about kettle in "Trochę Poświęcenia" -
"Kettle was a bit punctured, but witcher soldered it with Igni Sign."
There was also something about firing the torch, campfire, etc, AFAIR. General usage of Igni Sign.