It suffers too from the fact that Katie - who is 29 going on 15 - is the architect of her own misfortune throughout.
The book is billed as a 'comedy', but rather than finding Katie's exploits particularly amusing, the reader quickly loses sympathy for the character and wonders how a woman of 29 can mess up her life so spectacularly.
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But, for now, the former Britain's Next Top Model contestant is back with her debut novel, The Art of Scandal, which she wrote after Debbie was killed off last November.