I like the idea (and it's very cute!), but it feels a little busy. I think that could be solved by simplifying the book shape, if you're down to give that a shot (feel free to ignore me, ofc). Two suggestions to try, not sure if either will work:

• Get rid of the inner black line and the orange, and use a single black line down the middle for the crease instead. If the book shape isn't strong enough at that point, you can always try thickening up the edge, or coloring the whole shape.
• Alternatively, remove the black outline (and the orange fill) entirely (apart from a center book crease), and just have the ears, nose, and whiskers (maybe also eyes?) be a different color. Let the book be the highest contrast shape, so it's obvious.

EDIT: Ok, look, I was impatient to see what it could look like, so I did it myself. (I may have gotten a little carried away.)

@[email protected], YOU DID SO GOOD! LOOK HOW CUTE IT IS.