Bella Thorne never fails to surprise! We caught up with the multi-talented actress at her BOOK SIGNING -- yep, she wrote a book, y'all! Thorne was at Barnes & Noble to sign copies of her new book of poetry Life of a Wannabe Mogul: Mental Disarray.

Bella stunned in head-to-toe Chanel -- a logo-emblazoned jacket and sunglasses with denim cut-offs. She actually looked cute and normal -- contrary to her usual wild hippie-girl style. But her new, clean look wasn't the most shocking thing about Thorne yesterday, it was her announcement that she's directing a film for Pornhub!

Bella joined the porn site’s Visionaries Director’s Series with “Her & Him" which will premiere at The Odenburg Film Festival in Germany from Sept. 11 to Sept. 15.

Uh, gee -- we can't wait to see it?!