Sophie Kinsella is a bit hit and miss for me. I didn't think much of "Wedding Night" but "I've got your number" is clearly her best work yet. There are some memorable scenes throughout the book - in particular the "singing telegram" to the Japanese businessmen and the shopping for a replacement ring, which made the jewelers think Sam was a cheapskate, which made me roar in laughter. In fact the first half was written extremely well, full of good humour and a likable heroine. 
 The second half wasn't as strong (a 6/10 compared to the 10/10 for the first half) because it decended into predictability and lost it's humour somewhat, and became melodramatic. But I have high hopes for Kinsella. One of these days, she's going to perfect the formula throughout!