I've read "Can You Keep a Secret" and I remember staying up so late, shaking with laughter on my bed while reading it. I gave it 5 stars, I think. When I read the synopsis of "I've Got Your Number" I just knew I was in for another sleep-deprived night. 
 My advice: Do not read it in public. I was on the bus and I had to restrain myself from laughing. I couldn't put it down, and I kept smiling at myself even when I wasn't actually reading it. Like now. While reading, I was either laughing in my head (or aloud, if I'm by myself) because Poppy is so darn funny, or wincing because she's also so panicky and careless and really, really meddlesome. 
 Kinsella creates characters that are so simple and relatable. OK, not every girl can be as stupid as Poppy but you know, everyone gets his/her moments. Specifically, "inferior" moments. And Sam, Sam is your seemingly-typical-boss type but in the end, you realize he's not typical at all. 
 I love that Kinsella added a "corporate controversy" twist in the story; it made it more interesting and exciting. I love all the characters, I can imagine them vividly. This should definitely made into a movie. When that happens, I will be one of the first to see it in the cinema. :)