It's written in the present tense which, though it can feel odd at first, brings immediacy to the story, as well as providing a nice, subtle distinction between past and present. It's involving, and a real page turner. After a chapter or so you won't want to put it down. A completely absorbing read. Highly recommended.
If the 'jigsaw' style appeals to you, try [[Thin Blue Smoke by Doug WorgalWorgul]] – a story of Barbecue and dysfunctional characters. For more absorbing characters written in the present tense, try [[The Weight of Water by Penelope Evans]].