I've never read this book so I have no idea how an iguana fits into it, but this is a nicely detailed picture of an iguana. I'd probably crop it tighter since most of the back end is out of the picture, anyway, and the wood chips aren't of interest.
If Geisel had chosen to use photos for books,
Children probably wouldn't give them so many looks.
"I'm scared!" they might cry, if they turned to a page,
Where a face like this took center stage!
A great photo with crisp detail, though I don't associate the shot or the feel of the shot with the book you've chosen.