book jacket

Has I was looking through different sites I then found this interesting book design; interesting because of the flip book cover which makes it stand out. The design is originally from a graphic communicator Rachel wells who was trying to make a book with the theme heroes. She mentions that the reason for using the flip page cover was to show a collaboration of the teamed up colours. I though this was an effective and simple way of showing what she wanted to do for the collaboration.
Has it has always been said in the sessions, the more simple the outcome of the design is the more appealing it is to others.