I think this might be my new favourite Ali book. I loved the bits talking about deep learning and meeting Olive and Adam from The Love Hypothesis again!! So cute, the romance was adorable and the friendship with Pen was so refreshing too! 
It was such a fun read, it even got me interested in diving. But the kink? Was it even in the book with us? I wish she had explored that aspect more and had been a bit more ... "daring".