The clue was in the title really. Rock bottom.

I had some idea that Bryony Gordon had her demons, but I hadn't followed her story closely.

This memoir provides a shocking overview of how her life has been held captive by an addiction to alcohol and drugs, also sex, and food.

She repeatedly mentions her privileged upbringing, loving family and successful, fulfilling career. The fact that she holds all these things so lightly in preference for a good night out also doesn't go unacknowledged.

It is when she contrives to invite a near-stranger to her house for drink and drugs while her young daughter is sleeping upstairs, that she realises she needs help. She can no longer abide by the meagre boundaries she has set for herself.

With the support of her husband, family and friends, she undergoes a rehabilitation programme and, through the book, she takes us through that process. It's a fascinating, revealing, moving and compelling account.

She writes engagingly, of course, but the brutal honesty of this confessional took me aback on many occasions.

It provides such an insight into the mind and motivations of an addict and, finishing the book you cannot but wish her, and her family, well.