Neanderthal Marries Human by Penny Reid is book 1.5 in her Knitting in the City series. It is a continuation of Quinn and Janie's story from book one, Neanderthal Seeks Human, and must be read only after you have read book one. 
 I thought Janie & Quinn's story so far was phenomenal, this is the gourmet icing on top of the icing on the best cake ever. This book picks up where book one left off, and while it's numbered as an in-between book it is a full-length novel. 
 Picking up the story where book one left off and continuing just past the wedding we get to learn about Quinn's parents, see more of his sister, the knitting circle and get closer to Quinn's secrets. 
 An absolutely phenomenal book and series!