I'm up late having an insomnia bout and trying to get some work done, when I
hear all this knocking and scratching.  I look over and see Ana's (5 month
old foster kitten) head peeking out from behind the bookcase.  There's maybe
3-4 inches between the side bookcase and the wall, it's long and runs the
length of the wall.  She can't just walk out from behind it.  She must have
gotten on top and jumped behind there.  Why?  I don't know.  So, she's
mewing and trying to scale her way back up, I'm trying to move the very
heavy and stuff-laden shelves to give her room to get out.  While I'm doing
this, she does manage to scale the back of the bookcase and climb out.
I go back to work.  Well, all this excitement has created much interest in
The Land Behind the Bookcase.  So much bigger Bartleby, about 16 lbs,
decides he needs to go see what's back there and jumps behind the bookcase.
Then he decides he needs to immediately flee The Land Behind the Bookcase.
Now he's trying to scale the back of the case and I'm trying to get him
free.  He needs a much bigger opening than Ana did.  I move the bookcase a
bit so I can get him out, then 3 other cats decide to jump back there, since
it must be so exciting.
I give up!