I want to preface this by saying I've interacted with the author on numerous occasions, super cool guy. I'd been meaning to get into his work for a while, and I finally got the opportunity to purchase the first three books in this series. As of now, I've only read the first, but I have to say Matt certainly has talent. Salmonweird has a lot of quirky characters. My favorite would have to be Hook Hand Harry ( a pirate ghost).
The whole "how can dead people be killed?" thing is addressed in a non-cheap way. It also handles the trope of people not from our world (time in this case) being curious about modern life. Usually, when I see it in a movie or show, it feels like filler because it's been done a million times, but here it works. This story also handles pretty serious situations well, given the humor in it. Any author who can find that balance, I'm a fan of.
If I had to compare it to anything. It kind of gave Terry Pratchett vibes. I could easily see Salmonweir being a village on Discworld. If that's what you're into, except with horror instead of fantasy, check it out.