Charlotte Link 
Watcher [EPUB ebook] 

***16 MILLION COPIES SOLD*** 'A brilliant novel with compelling characters’ Sunday Times Carla Roberts lives alone in a high-rise in Hackney. The lift keeps stopping on her floor, but nobody gets out. Days later, she’s found brutally murdered.Samson Segal has taken to spying on his neighbours, particularly beautiful and successful Gillian Ward. And when Gillian’s daughter finds herself locked out the house, Samson takes her in. But her lack of appreciation makes him angry, and he vents to his diary, unaware that his sister-in-law cracked his password long ago…When Gillian’s husband is murdered, Samson finds himself under intense scrutiny. And the only man making any progress on the case shouldn’t be working on it. Yet he’s the only one who believes Samson is innocent…