I think this book could have been done a lot better. I mean, the main plot was clearly Marco's struggle with his dad remarrying, but then they had the stupid plot of yet another celebrity endorsing the Sharing, and of messed up morphs. Hm, sounds a bit like book 12, only not done as well. It was like the plot was just thrown in, because they knew they needed more than "just" Marco's dad remarrying.
Although, the "poo-bear" joke was hilarious. XD