LConradBook_020310_08.jpgLauren Conrad has successfully transitioned from reality TV to fashion to publishing!

The mini-mogul just signed another three-book deal with HarperCollins, according to

The Fame Game trilogy is set in the world of reality TV, featuring Madison Parker -- the uber-ambitious character from Conrad's L.A. Candy series.

LC tells the mag: "This series is about a girl who loves everything that fame is, and that's all she's ever really wanted. [Madison] has fun with the press, she enjoys the attention, she welcomes scandal!"

Sound familiar? Well, Hills star Conrad swears Madison isn't auto-biographical.

Decide for yourself ... the third book in the L.A. Candy series, Sugar and Spice, is on sale today!