There are some really cool additions to this Target novelization, like a backstory for Bonnie that reveals how she had met a Zygon who took on the form of Danny Pink and called himself 'Clyde'. It does a particularly excellent job at diving deeper into Bonnie's motivations, and why she is so bitter towards the ceasefire.

It's also interesting reading The Day Of The Doctor from Osgood's perspective. It's a neat way of incorporating the flashback to Day of the Doctor at the beginning of the story.