The adventures of Ook and Gluk : Kung-fu cavemen from the future : [the second graphic novel] by George Beard and Harold Hutchins /
Kung-fu cavemen from the future.
[Dav Pilkey].
- New York : Blue Sky Press, c2010.
- 175 p. : chiefly ill. ; 22 cm.
"Tree-house comix proudly presents"--Cover.
Friends Ook and Gluk are always getting into trouble with their village chief until they pass through a portal into a future run by the chief's descendant, where they learn kung fu so they can return to the past and free their people.