I just did a search on Pinterest for bookcase with cat and got this
https://www.pinterest.com/pin/311592867954002223/
I followed the link to the flikr
https://www.flickr.com/photos/441372...n/photostream/
I think this may be an original creation. The cat appears to be a broderie perse type applique and a couple of links I visited speculated she printed a photo of a cat onto fabric and appliqued it on. The maker also included some very cute and unique embellishments like the tape measure coming out of the cup and hand embroidered titles on some of the books.
There are many book case patterns out there you may have to start with one of those and modify it to include some of your favorite interests. Getting a cat photo in just the right position and size could present a challenge.