Author unknown for both. These are books for very young children that take roughly 30 seconds to read out loud in their entirety. I bought them a few years ago for my nieces, who still enjoy hearing the stories as they play with the matching toys in the bathtub (a clownfish and a hippopotamus, of course). The books are plastic, waterproof, and inflated, so they are good bath toys. Each book gives a little bit of information about the habitat of the animals (ocean for the clownfish, savannah for the hippo).
"Oh, you can’t help that," said the Cat: "we’re all mad here. I’m mad. You’re mad." "How do you know I’m mad?" said Alice. "You must be," said the Cat, "or you wouldn’t have come here.”