I'm still working my way through The Social Distance Between Us by Darren McGarvey. I mainly read at work, so maybe only 30 minutes a day, but I'm slowly getting through it.
I also just finished reading through George RR Martin's A World of Ice and Fire.
I'm not sure they really fit into the category of murder mystery that you're looking for, but I recently read both The Seven Deaths if Evelyn Harcastle and The Devil and the Dark Water and absolutely loved both of them.