Kobo and Sainsburys (ie epub). It's 49p at amazon.co.uk at the moment.
Fans of the Divergent series by No. 1 New York Times bestselling author
Veronica Roth will be thrilled by the knife-throwing scene from
Divergent, now told from Four’s perspective. This brief story explores
the world of the Divergent series through the eyes of the mysterious but
charismatic Tobias Eaton, revealing previously unknown facets of his
personality, backstory and relationships.