Most book lovers also have an appreciation for cover art and, personally, I always find myself strangely drawn to the book covers of fantasy and science fiction novels. I am aware that this may not be to everyone's taste, but I - for one - enjoy looking at it.
I recently found a number of flickr groups paying tribute to cover art and cover artists. Whilst some might not see the point of photographing the covers of the books on your shelf and sharing these images with others, in my humble opinion it is a jolly good idea.
By no means representative, but nevertheless a first impression of what is on offer over at Flickr, here is a selection of book covers featuring in the group "Hi - Res Science Fiction Book Covers":
Hi-Res Science Fiction Book Covers, a group on Flickr
And this is an overview for the "Books of Fantasy" group
Books of Fantasy, a group on Flickr.
These groups are just a taster for what is on offer - the perfect destination for an afternoon's browsing and to gather inspiration for your to - read - list.