i don't really know what to think about this book. it was not that bad but i'm really glad it wasn't long & i finished it now.
Through the whole book i was kinda confused and didn't quite get what it is about ... i mean, except for the dumping thing.
i expected a funny story but then there were maths, formulas, graphs and all that stuff ... oh and i'm tired of katherines now - there were too many of them, it was just really confusing!

All in all it was "okay" but i wouldn't read it a second time (plus: i didn't even read the appendix)