I'm currently reading Murder Most Malicious by Alyssa Maxwell. This book is the first in the Lady and Lady's Maid Mystery series and will be released December 29th.
It's December 1918, just after Christmas in England. Everyone is still feeling the effects of the war, those above as well as below stairs. When Henry, the Marquess of Allerton, and houseguest at Foxwood Hall doesn't arrive for breakfast on Boxing Day the rest of the household is surprised. However, several of the servants receive an even bigger surprise when they open presents from their employer. Lady Phoebe and her maid Eva are not convinced the police will investigate properly and start looking into the situation themselves. Could Pheobe's elder sister Julia have something to do with it? Or Henry's younger brother?