He has the key to hundreds of houses. Maybe even to yours.William Heming is an estate agent. He's kept a copy of every key to every house he's ever sold. Sometimes he visits them. He lets himself in when the owners are out. But what will happen if he gets caught?What will he do next?'Wonderfully creepy ... a deeply unsettling and original hero' Rosamund Lupton, author of SisterA superbly plotted and genuinely creepy novel' Sunday Express'Almost unbearably tense at times' Daily Mail'I loved it - gripping, sinister, original and brilliant' Sophie Hannah, author of Did You See Melody?'A wonderfully sinister fable of property and obsession' Observer*Previously published as A Pleasure and A Calling*