I've read it and I found it to be the most useful book on writing I've read so far, because he grounds his advice in clear linguistic principles and he is mostl

I've read it and I found it to be the most useful book on writing I've read so far, because he grounds his advice in clear linguistic principles and he is mostly not prescriptivist in his advice. His advice about keeping an easy-to-understand sentence tree alone is worth the price of admission.