This is the Bible for people doing research into the foundations of QM!!
It starts with the basics and it goes very far into the subject - it is still the only book i have found that has the proof of the Kochen-Specker theorem!!
I recomend it to anyone that has done QM for a couple of years and still hasnt done the Kochen-Specker theorem, the EPR experiment or the bell inequalities - when people talk about QM being very weird these are what the person is on about - not the wave particle duality, which is only the begining...
... by the way when people talk about schrodinger's cat they usually have that wrong and missunderstand what the point is - the weird thing is not that the cat is both dead and alive at the same time - its that it is NEITHER untill there is a measurement!!!!!!!!!!!