Firstly let me say that Mike Gayle is my favourite author. However this book was not one of his best. His previous books could be enjoyed by male and female readers. Being a male myself, I did not feel 'Brand New Friends' appealed to me, but I would imagine that the female reader would get more out of this book.
If this is your first Mike Gayle book, I would recommend that you forget about it, to avoid disappointment and try 'his 'n' hers' or 'my legendary girfriend, first.