The Adventures of Ook and Gluk Jr: Kung-Fu Cavekids in Outer Space is a possible upcoming sequel to The Adventures of Ook and Gluk: Kung-Fu Cavemen From The Future. It was teased to be "coming soon-ish" on the last page of its predecessor, although no release date has been announced.

The book would star Ook Shadowski II and Gluk Jones II, and the return of Ook Shadowski, Lan Wong, Gluk Jones, Gak Shadowski, Lily, and Mog-Mog, as their children are sent to outer space on a rocket, fighting against aliens.

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