The book might be considered Wabi-Sabi, but the subject really is the ring and the heart shaped shadow it casts. Good composition, lighting, and it conveys a message. It's a good image, even if it seems like a shoehorn to me.
The shadowed shape of the heart is awesome, however... I would have liked to have seen this with perhaps a recognizable love poem in the background. The words 'bumps' and 'spluttered' jump out at me for some reason, and it takes my eye away from the focal point. The concept itself is fantastic.