That seems fine. It all depends on the intended use. If this is for a modern PC game, and is one of many props within a house, then it's ok. If it's a hero prop, it's probably not enough detail. If it's for a mobile game, it's too much detail. Etc.
The large polygons are worrisome. Triangulate and see what happens to the shelf.
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Also, http://wiki.polycount.com/wiki/Polygon_Count#Polygons_Vs._Triangles
The large polygons are worrisome. Triangulate and see what happens to the shelf.