Houghton Mifflin,, c2008.
58 p. : col. ill., col. maps ; 25 x 26 cm.

National Geographic,, c2007.
64 p. : col. ill., col. maps ; 26 cm.

National Geographic,, c2007.
64 p. : col. ill., col. maps ; 26 cm.

Kingfisher,, 2007.
[64] p. : ill. (chiefly col.), maps ; 28 cm.

Alfred A. Knopf,, 2006.
1 v. : col. ill., col. map ; 31 cm.

DK Pub.,, 2006.
67 p. : col. ill. ; 31 cm.

Heinemann Library,, c2006.
64 p. : ill. (chiefly col.), col. maps ; 25 cm.

Peace Hill Press,, c2006.
x, 338 p. : ill., maps ; 22 cm.

Nomad Press,, c2006.
140 p. : ill. ; 26 cm.

Houghton Mifflin,, 2005.
50 p. : ill. (some col.) ; 24 x 29 cm.