Cold Hearted is the top of the lift hill in the Yancy Lazarus roller coaster. It's a little slow at first, but as you climb you can see more of the park, a bird flies in your face, your SO laughs but looks nervous, and then you're looking down the rest of the track with your stomach in your throat and the first car pitches forward.
A note about the series: I'd recommend reading Siren Song first, and Strange Magic after. The first reason is that Siren Song is free and it's a good story. The second is that the best thing about Cold Hearted is Yancy, and you're either going to really dig him or you're not and he doesn't care for you either. Reading Siren Song will make Cold Hearted a deeper, more layered experience. It's also worth mentioning that each book in the Yancy Lazarus has been better than the one before it, so if you like Siren Song, you're going to love Cold Hearted, and that's going to make Strange Magic better for you while you chew through your metacarpals waiting for Wendigo Rising.
But on to Cold Hearted. It's a story about a grail, a guy, a girl, a couple guns, and fear. Lots of fear. Cold Hearted explores phobias, past fears, fears of the future, and fears of the present, and God bless us, every one! Give it a think once you've finished the book, it might add some flavor to the meal.
It's also a lot of fun. James Hunter delivers a magical world that's part SMGs and sorcery, part Celtic myths, and part nuclear post-apocalyptic shanty town. In the middle of it is Yancy Lazarus, Vietnam veteran, guitar player, muscle car aficionado, and mage-guild "cleaner". Except he gave the guild the finger and decided to gamble and drink instead. Hunter does an excellent job of keeping the world unpredictable, which comes across as gritty, dark, or cute but always homicidal. It's all happening right under the rube population's noses, but it's done in a way that believable and a little bit dirty, like an alley behind a bar.
I say it's the top of the lift hill because about halfway through the book, you know this is a setup. You know there are dark forces (or one particularly devious mastermind) setting up a new world order, and you can see there's going to be an epic fight between the forces upholding the status quo and other possibly morally gray groups. I don't know, but I'm looking forward to it. In the meantime, Yancy will punch, shoot, burn, and talk his way past murders of mutants, gnomes, snowmen, sylvans, cyborgs, mages, and an old man with a heart of ice.
So get reading; Wendigo Rising comes out in November.