When you give lectures or autograph sessions you will notice that your audience would like to take selfies with you. Why would you not provide them a background where this can be taken? A background preferably with your name and book on it. This way, when they post these pictures on social media, they make publicity for you too. Furthermore, it is always nice to put such pictures on your website and social media too. It has a lot of advantages.
A bit of advice, instead of creating one big picture, a step in is more effective if you create it as a repeat banner. Central one nice element, but your name and logo should be all over your banner. When selfies are taken, there will be always at least once your name fully visible.
We can create such banner design for you. (8’ x 8’ – step & repeat, size can vary depending on your printing company)