http://chicago.whitesox.mlb.com/cws/fan_forum/kidsclub.jsp -click sign up now at the bottom. Includes: Official Membership Certificate, Official Welcome Post Card from Manager Ozzie Guillen, Baseball Cards (set of six) featuring current White Sox Players, White Sox Temporary Tattoos, White Sox Kids Club Poster, Two (2) ticket coupons redeemable for Upper Reserved seat tickets to Regular-priced games (excludes Prime, Premier and Sox/Cubs games during the 2008 season)

Link -follow the directions on that page to get the book