I found the premise of "The Rules of Vanishing" very compelling, and the world building was top notch. The writing really drove the story and what was at stake. I was extremely impressed in how the author was able to jump in between character perspectives using "testimonials", "videos", and other media. It is very difficult to keep the reader engaged with the transitions, but Marshall did a great job in that respect.
I did however had a hard time connecting with the characters, and the myriad of secondary characters made it difficult to follow at times. The other aspect that skewered this novel was the love sub-plots. I found that they didn't add anything to the story, and I wished that Marshall focused on character development rather than adding love sub-plots that were not going anywhere or driving the story.