We found 1 Reddit comments about Naruto 63. Here are the top ones, ranked by their Reddit score.
http://www.amazon.co.uk/Naruto-63-Masashi-Kishimoto/dp/3551784345/ref=sr_1_9?s=books&ie=UTF8&qid=1417746079&sr=1-9&keywords=naruto I think volume 63 is the latest German release. They have the rest of the volumes on amazon too so you could find out what his favorite part of Naruto is and buy the German manga volume for that bit of the story.
http://www.amazon.co.uk/Naruto-63-Masashi-Kishimoto/dp/3551784345/ref=sr_1_9?s=books&ie=UTF8&qid=1417746079&sr=1-9&keywords=naruto
I think volume 63 is the latest German release. They have the rest of the volumes on amazon too so you could find out what his favorite part of Naruto is and buy the German manga volume for that bit of the story.