What a pleasure to read. It had me hooked I was so invested to know what's going on. 
This is similar to knifes out with a bit more romance, subtle mix between a Christmas Whodunnit and a sweet Christmas romcom.
The queen of mystery invited three authors, a police officer and her family to celebrate Christmas with her in her English countryside mansion, but she goes missing out of a locked room so the mystery begins... 

I would definitely recommend reading it.