The Couple next door is probably one of the most talked-about thrillers - a twisting, utterly riveting tale that will send readers on a wild rollercoaster ride of emotions. Your neighbour told you that she didn't want your six-month-old daughter at the dinner party, it's nothing personal, she just couldn't stand her crying. Your husband said it would be fine, after all, you only live next door. You'll have the baby monitor and you'll take it in turns to go back every half hour...