In what torchwood novel do jack and ianto go out on a date?

Jack and Ianto don't go on a date in any of the official Torchwood novels.

While their relationship is explored in many of the novels, focusing on their romantic side is not the central theme. Most stories focus on the team's adventures, their struggles, and the mysteries they face.

However, their relationship is often hinted at and explored subtly throughout the series, leaving room for fans to interpret their dynamic.