This is book 2 of the Switchers series (book 1 is [book:Switchers|296524]). Tess is fourteen and only has one year to decide what she wants to be forever. At the age of 15, she can no longer switch shape at will. Her old switcher friend, Kevin reappears as a phoenix and Tess thinks it would be cool to be a phoenix forever, as well. Then she meets another switcher, Martin, who is a vampire and she's conflicted.
In a juvenile way this is an interesting series. Definitely something the younger generations would enjoy - 11-16 year olds. It's entertaining but not very stimulating.