The doorbell rings, just days after my beloved husband's sudden death. I don't recognise the woman on our doorstep, with a bouncing baby boy in her arms.

As I show her inside, I notice her eyes grow wide as she glances at the silver-framed family photos and my little daughter hiding behind my skirts.

She looks at me, her blue eyes serious. 'I'm sorry' she says. 'I know this will be hard to hear. But I am your husband's girlfriend. And this is his son.'

An utterly gripping psychological thriller from the number one bestselling author of The Marriage. If you like Gone Girl, The Girl on the Train and Lisa Jewell then you will be hooked by The Girlfriend.

'This book was a nail biter! It had suspense, intrigue, murder, and so many crazy twists and turns! The storyline was very interesting and had me glued to my Kindle! I highly recommend reading this book! It was definitely worth reading!' Netgalley reviewer, ?????

'Omg what a read, I love this author and for me this is her best book so far. I loved everything about this book. Great characters, full of heart stopping moments and packed with tension and suspense. I devoured this book in one sitting. Was totally immersed in the story that was unfolding. Cancel everything and read this book. I promise you will not be disappointed.' Goodreads reviewer, ?????

One thriller of a read!... OMG- one of those reads you can't put down as every page puts you deeper into the mystery, just as I love them... truly brilliant. A wonderfully thrilling read that kept me turning the pages until the very end.' Goodreads reviewer, ?????

'Loved!!!!! Devoured in just a few sittings. It was just that good. In fact, it was her best book to date so far. It had so many twists and turns. I was hardly able to keep up. This author is one of my favorites and this book proved why. It kept me guessing the whole way through. I never knew what was going to happen next and I had to race through each chapter like it was the last just so I could find out the truth... I loved it...' Blue Moon Blogger, ?????

'This is such a gripping, unputdownable thriller that will put you on the edge from start to finish!... it was gripping with twists and turns along the way... I was literally hooked into the story and this book has all the traits of a good psychological thriller--gripping, unputdownable, fast paced with twists and turns!' Tropical Girl Reads Books, ?????