Unfold the truth. Or how to smooth out wrinkled game cover?

[AlexRNd]

Hi guys and gals!
I wanted to ask you for help, i trying to figure out the ways to smooth out wrinkled paper, particularly, it is a PS3 game cover... There is an autograph on that cover and it has a facture so i scared to use any water/ironing methods, i want to protect and preserve it from disappearing.
Is anyone had experience in smoothing out wrinkled covers?
My current method - putting it between 2 heavy German dictionary books. Dont know how long it takes, but for now this is the best what i can do.

I would love to hear any pro advices)

Thank you!