Good luck and use your flash light. I had Zeke get out 4 times in 5 days...kept saying there was no way he could lift the books!! Now I have locks On one escape I tore my closet apart 3 times but did not completely pull out storage tubs, just looked behind...the little guy had wedged himself inbetween the lid of the tub and the shelf...did not see him until I shined the flashlight and looked up under the shelf! Good luck!