After a few days mulling over the possibilities, I have just joined Book Sprout.

Book Sprout is a new book and author discovery app. The idea is that you follow authors to get notifications of their new releases and deals straight to your tablet or 'phone. You will also get in-app suggestions of similar authors to the ones you have followed.
My Book Sprout author page is at https://booksproutapp.com/author/466/alasdair-shaw. Follow me to get started...