Book cover series

Common themes

I looked at the covers of more book sets that I liked.  It was interesting to find that many sets only had one or two design features in common.  I like this set, but it is only the binding, sans serif font and size that are common, along with the flat bright colours, however they still have the feel of a set.

This set is also quite diverse, but with a common typeface throughout.

http://lilrobin.com/work/publishing/books/bn-book-cover-series/