Book three in the Facilitator trilogy.
I really enjoyed the first two books however changing the character perspective in book three is a bold move and it's a choice to make the new perspective sound identical to the other character. I was constantly pulled out of this story because Mackenzie sounds identical to Lauren.
Plus the word 'chuckle' really grated on me, a word search on Kindle revealed it appeared 109 times! It felt very overused.