ABANDONED. heroine is on a trip in a train. Somewhere in between in desert area, the train has to stop for a few days due to some issue. She is forced to stay on there. She is in the middle of an unhappy marriage. Agatha Christie book.

[Jaya]

The heroine is on a trip in a train. Somewhere in between in desert area, the train has to stop for a few days due to some issue. She is forced to stay on there. She is in the middle of an unhappy marriage. During that few days of forced exile, she comes to understand the facts about her marriage and decides on future course of action, However on return, she again goes back to old ways.
Not sure if there is Poirot in it. Also whether there is any mystery.

[Zenta]

Could it be Absent in the Spring

[Kris]

No response, moving to Abandoned folder.

Jaya (OP) was last active on the site in May 2020.