Amy Winehouse's husband is set to reveal all about his prison torment in his personal diaries. Blake Fielder Civil's proposed book will include his musings about his difficult time behind bars at London's Pentonville Prison - where he is awaiting trial on charges of assault and attempting to pervert the course of justice - as well as intimate letters from his troubled wife.

One source said: "He's been going through hell and back inside. He started writing mostly as a way if getting through the days - but he's found it a form of therapy."

Blake - who was reportedly put on suicide watch when he first entered jail - was said to be devastated when he heard Amy flew to the Caribbean with her ex-boyfriend George Roberts and spent a night in a hotel with producer Mark Ronson.

The 25-year-old has also been constantly worried Amy will die of an overdose and is under immense pressure from his mother to divorce the singer.

Blake decided to stand by Amy after a video of her smoking crack emerged and she checked back into rehab.

Meanwhile, it has been confirmed Amy was rushed to hospital on Wednesday after suffering "dangerous levels" of dehydration while going 'cold turkey'.

The 'Rehab' singer - who entered London's Capio Nightingale Hospital last Tuesday - was taken to a private London clinic where she was put on a drip after suffering horrific withdrawal symptoms.

A source said: "Amy was looking very pale, thin and exhausted."

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