Katy Perry isn't afraid of much so we're unsure of this, but…
According to sources in the publishing world, Russell Brand has decided to move forward with the third installment of his Booky Wook memoir series.
Another source claims Katy is worried, saying there are definitely things she doesn't want out in the open.
But ya know what!!! We're not buying it. We HIGHly doubt Katy is shaking in her boots over this. Whatever he writes will be from his side and she has to know that.
[Image via David Durocher/WENN.]