The book "Before I Go to Sleep" (original title "Before I Go to Sleep: A Novel") is a fascinating psychological drama by the British writer S. J. Watson. The main character, Christine Lucas, suffers from amnesia, which makes her life always new and unknown every morning. To understand what happened to her, she starts keeping a diary in which she records all her impressions and discoveries. The tape of her life weaved again and again, changing her perception of events and people around her. The reader, together with the heroine, tries to solve the mystery hidden in her memory and reveal the real truth about who she is and what she had to experience. "Before I go to sleep" leaves the reader in tense anticipation and on the verge of a nervous breakdown, revealing the secrets that the human heart is filled with.