If I were you I would make the decorative stuff on the cover of the book much thicker and I would give the overall book some more shape. The concept is heavily stylized so you have to really push the shape/silhouette of the model.
You could definitely exaggerate the thickness of the details on the front to match the thickness of the cover itself.
Another thing I would consider, are the pages. You could look into creating edge loops around the pages and extrude some out to begin defining pages as the concept does. Similar to this, but better ofcourse, I literally did this in 2 mins xD https://i.gyazo.com/e4c14d844c1056a4cb52f9d9aa6cbe3b.png
Thank you for all of the comments and critiques, I will definitely keep them in mind as I move forward with this project. In the mean time I also have to work on this
I would love to give more credit for this work but have been unable to go the website on the picture. My current WIP:
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You could definitely exaggerate the thickness of the details on the front to match the thickness of the cover itself.
Another thing I would consider, are the pages. You could look into creating edge loops around the pages and extrude some out to begin defining pages as the concept does. Similar to this, but better ofcourse, I literally did this in 2 mins xD https://i.gyazo.com/e4c14d844c1056a4cb52f9d9aa6cbe3b.png
I would love to give more credit for this work but have been unable to go the website on the picture.
My current WIP:
Once again comments and critiques are welcome.