The Ice Princess by Camilla Lackberg

Erica returns to her hometown of Fjallbacka after her own parents have died. When she's back in town, her childhood friend, Alex, is found dead in her bathtub with her wrists cut. It looks like a suicide, but is it?

I was engrossed in this book. I carried it around wherever I went just in case I had time to read a page or two. It's a twisty, readable, suspenseful book with a surprising end. Recommended if you're looking for a fast, light, fun read.

Thanks to Mia for this recommendation!