Despite the clear Sci-Fi elements expressed in the blurb of this story I was interested in reading more Matt Haig novels, especially as The Midnight Library and How to Stop Time are some of my favourite books. 

Here's what I liked:
-Short, sharp and snappy chapters. I am so much more motivated to read the story quickly when it is like this. 
-The Mr Bean like character of Professor Martin/alien. It was especially comical and light while allowing me to think about all the ways that humans are the strange race. His character arc was also intriguing to follow, a tad predictable though. 
-Classic Matt Haig writing style. I love how philosophical, reflective and true his narration is. Makes you really think. This novel in particular made me reflect on the meaning of life (pgx) and love (pg221) as well as body and mind connection (pg108). I terms of human nature I was also encouraged to consider the inherent good, or bad, (pg128), the many contradictions we have as humans (pg248) and the power of hope (pg170). 
-The family dynamic that the alien encounters whilst in the skin of Professor Martin and how this takes shape throughout the story. 

Here's what I didn't enjoy:
-I felt like a lot of the sci-fi elements were too extreme for me and flew over my head. A lot of the maths also drove straight on by. It zapped me straight out of the fiction each time. 
-There were actually a few gory, uncomfortable moments to read. 

Key quote "Maybe that is what beauty was, for humans. Accidents, imperfections, placed inside a pretty pattern. Asymmetry. The defiance of mathematics" (pg100). 

Overall this is not my favourite book or a stand out Matt Haig book for me however It was a memorable one.