The Ghosts of Halloween (Learning Curves #1.5)
Ceillie Simkiss

The Ghosts of Halloween collection is made up of three sweet slice-of-life short stories: Past, Present and Future. Each tells the story of a different Halloween that Cora and Elena have gone or will go through together.
Past: Cora forgets about a planned Halloween party she’s supposed to attend with Elena. Will she make it in time for the festivities?
Present: Elena gets a surprise invitation to her new job’s Halloween party - and costumes are mandatory. Will they come up with appropriate costumes in time for the party?
Future: Five years after the events of Learning Curves, Elena takes her niblings trick-or-treating. The last house they visit has a bit of a surprise in store.
The Ghosts of Halloween is a continuation of the Learning Curves series, but can be read as a standalone collection featuring the lesbian and asexual characters from the original stories.