From the book's description:
Brad Silverstone is only 16, yet he is the standing heir to one of the country's most fabulously wealthy families. Tall, well-built, and strikingly handsome, he has eyes only for one girl: his own high school English teacher, Sophia Masterson--a deadringer for Katy Perry. Yet, little does he know that Sophia also nurtures a secret desire for him--a desire so overwhelming that it is compelling her to do the unthinkable and to sink her teeth in that delicious but forbidden kind of love.
Check out the book here.