This was surprisingly quite basic and straightforward story. Something that really felt could've been squeezed into a 45 minute episode. It's very small scale but has a nice pace to it and some good characterisation and a solid plot on the concept of making first contact and potential issues that arise from it. This was my first Fifteenth Doctor book and they really nail his personality, I think it's a real talent from book writers how they can easily shift the Doctor's personality according to each incarnation.