These files were previously uploaded to Mangahelpers.com, however Mangahelpers.com is currently experiencing menstrual difficulties and has removed the files from its server. As such, I'm reposting them:
One Piece 10th Treasures
Red Data Book Grand Characters
Blue Data Book Grand Data File
Yellow Data Book Grand Elements
*Note: Color Walk 4, scanned by Al!naJames, is available for download from her site, here: http://www.onepiece.ru/manga/Artbook/EAGLE.zip
Grand Paper Adventure 3D
The Red, Blue, and Yellow data books, 10th Treasures, Color Walk 3, and Grand Paper Adventure were scanned by me. Color Walk 1 and Color Walk 2 were scanned by EIEN ni ANIME.
*EDIT: rapidshare mirrors added, courtesy of masterMD112. Anyone who wants to provide more is more than welcome to.