A book ^_^
To be released soon
SS501's PiMil (Secret)
SS + S (secret) = SSS (triple S!!)
info from ss601 which I saw from, thanks to sharer akigirlnim
this is the url that she has shared, click me
from at kyobo bookstore, sale details are on it
Sale price: 18,560 won
maybe your partipation would kindly appreciated.. ^___^