Recently got the book on recommendation of Mati Meron. I just want to say
it is a fabulous little book - not quite up their with Landau - but close.
It weaves the interconnections between classical and quantum mechanics and
QFT theory like no other I have found. Great insights all the way through -
such as why we need the operator formalism of QFT (the reason is it allows
an out to the acasualty problems of SR applied to the Feynamn formalism -
reinterpreting it as a non local operator immediately solves the problem and
since we know from the cluster decomposition property this is possible it
works).

Good one Mati

Thanks
Bill