Ashes to Ashes is a very interesting book, because I don't think Hoag knew it was going to be part of a series when she wrote it. The rest of Kovac and Liska is a little more standard for detective series.
Over the past month or so, I read through a few interesting books. I did Everyday by David Levithan, which is really the book he's been living off for years now. It's pretty good, but it gets mad preachy about 60 percent of the way through. Dawn Patrol is another Don Winslow/Ray Porter combo. It was pretty cool, though it got overly descriptive. Neal Asher's Transformation trilogy is shaping up to be pretty awesome. Book Three isn't coming out for another year, though. Edge of Lost was a nice little story about family and immigration (the happy-go-lucky Ellis Island kind). Also knocked out a spin-off of Kovac and Liska called Cold, Cold Heart. Was VERY different from the main series, though it was still good.
Having a hard time right now with books. I am crawling through Handmaid's tale. I tried NOS4A2 again, and again I put it away. Trying to get into BV Larson's Lost Colonies series, but that's slow as well. Hopefully at least one will pick up so I can get to more books. Still have 30-40 in my queue that I have already purchased, so I don't want to get out of the habit of listening to Audible on account of some dubious selections.