Being Nikki by Meg Cabot (published by Scholastic, May 5, 2009)
Emerson Watts is still struggling to adjust to living in the body of famous supermodel Nikki Howard, following an experimental brain transplant by Stark Enterprises, the company Nikki worked for. Em, a brainy geek who would rather hang out with her best friend Christopher playing video games, is the exact opposite of Nikki, so it's hard for her to live the life of a supermodel, with constant photoshoots and an upcoming appearance in the Stark Angels lingerie fashion show that Em is dreading. All she wants is to tell Christopher who she really is, and that she likes him as more than just a friend, but he believes that Em is dead and she is afraid to tell him otherwise because she believes Stark Enterprises is spying on her.
To further complicate things, Nikki's brother arrives in town, and informs Em that his mother is missing, and asks for "Nikki" to help him find her. When Em runs into Christopher while secretly visting her family, she decides to ask him for help finding Nikki's mom. In return, he wants information about Stark Enterprises. Soon Em begins to suspect that Stark is up to something really shady, and that it may be connected to the disappearance of Nikki's mom.
Being Nikki is an entertaining sequel to Airhead, the first book about Emerson Watts. It has a good blend of romance, mystery, adventure, and teen life - all the ingredients you'd usually find in a Meg Cabot novel. Meg's many fans are sure to enjoy her latest book. The ending is a perfect lead-in to the next book about Em, which I can't wait to read.