There seems to be a CD included inside.
More details can be found @ here
Arashi/Kangeki no Arashi! - A RA SHI no 10 Nen - BOOK
1200 yen US$12/98.5 Release Date:2009/05/27
Description:Special photo book release from Arashi featuring lots of rare off shots since their debut in 1999. Size: A5 / 112 pages / full-color
URL - http://cdjapan.jp/d.html?KEY=