‘It's certainly a novel that is full of surprises…the story and characters will stay with me for a long time to come. Powerful, emotional and heartbreaking, The Promise is this year’s must read.’ By the Letter Book Reviews

‘I actually think I read this book without breathing! Seriously I started it and could not put it down, so fast paced and gripping was the plot! …Warning - once you start this, batten down the hatches because you are going nowhere until you are done!’ Chapter In My Life

‘Casey is fast becoming one of the best writers in this genre, her talent to weave a suspense filled novel is going from strength to strength…I feel like 5 stars really doesn't justify how great this book is.’ Vix 2016

‘All I can say is... BRILLIANT! I demolished this standalone novel in a day! The very first chapter completely sucked me in, I literally couldn't put it down! Before I knew it I was at 76% and I happily lost precious sleep last night in order to finish it.’ Booklover Catlady

‘An outstanding book that I devoured in just two sittings…nothing could stop me reading…I was captivated … truly enjoyed every page. I think the biggest surprise for me was how the story unfolded … A blinder of a book which I would hugely recommend to everybody reading this genre.’ Best Crime Books and More 

‘Wow, this book was indeed not for the faint-hearted!…Full of twists and turns, gripping, intense and very well written…Highly recommended.’ THE Book Club

‘To describe it in one word I would say “outstanding” and you would be an absolute fool not to pick it up.’ Book Addict Shaun

‘Casey is firmly embedding herself in the list of “must read” female British Crime Authors.’ Best Crime Books