I really like this author!
No. 4 was Sue Henry's Beneath the Ashes. It's set in Alaska with a musher main character. I like Henry's writing style! She includes lots of details, but it's not wordy - just the right amount. And the mysteries are good, keeping me guessing until the end.
I'm heading to Alaska for the first time this summer, so I've especially enjoyed learning about the culture that's so different from here.