"Original concept: Tetsuya Nomura" -- p.  of cover.
A all ages.
"Xion, having failed her last mission, is left unconscious and out of commission. Unfortunately, Roxas doesn't have time to worry about his friend because he's been ordered to go to Wonderland with Organization XIII's No. 10-the Gambler of Fate, Luxord. Can Roxas keep up with the old man's games?! Meanwhile, a confrontation with Saix motivates Axel to find out who Xion really is..." -- publisher's web site.