I really enjoyed reading this book - a familiar genre but with a fresh feel. Excellent pace, cute themes (restaurants, theft from petty - bananas - to grand, working out, dress sense, motorbikes ...) and a new setting (Sao Paulo) kept me reading. At first thought the short chapters looked odd, but found them perfect breaks for time slicing other activities, nevertheless read it pretty much cover to cover in 2 sessions. Nice use of threats - some of which materialise, some of which don't, similarly nice bits of humour (the Arthur Anderson reference made me chuckle out loud).
The plot and unravelling is fairly procedural, the enjoyment I got is it didn't need a PhD and notes to follow. Who is watching who is watching who is well used and not abused - just enough to let my plot solving vanish down dead-ends! The real pleasure of the book is the pace and descriptions of a fictional world that was well painted and plausible. I felt it was real, in my mind were scenes from the (potential) film.
Congratulations on a great first novel!