That's right, she's writing a book!

The reality star slash fashion designer will pen True Whit - loves the title! - for It Books, due out in 2011.

Whitney says the following: "It's a really fun and fresh how-to-guide where I can share anecdotes that I've learned from both work and my personal life."

Her publisher adds that the advice book will be a "conversational, fun, and candid guide for girls looking to start out [in life] with style."

Sounds like a bestseller already! But will it be more popular than LC's, er, novels?