Wrapping up the last few pages of the Kay-Bee sketchbook, pages 20-22, we first see a rough sketch of Casey's grandmother's farmhouse and barn. I think I did this to work out how it would look on the last page of the story in issue #12 of TMNT Volume One.
On the following page, there is another rough sketch of two of the members of the survivalist group from that same issue.
And on the final page of this sketchbook (at least, the last one with anything drawn on it) are two rough sketches -- one depicting another of the survivalists, and the other the look of the little shack wherein the survivalists have hidden their homemade nuclear device. -- PL