I really enjoyed this one. It wasn't Murder on the orient express but the similarities couldn't be missed. Short chapters, multiple POVs and the pov of the murder kept me engaged and guessing. Did I figure someone it out? Yep did I figure all of it out? Nope. 
The subplot of the daughter in labor felt unnecessary but it wasn't distracting.
Favorite character: Mary I love a feisty old lady!