Plus, it's also a book on active manipulation (in a wider sense) and an even better when read after "When I say no I feel guilty" which deals with defending against manipulations.
None of them can be read in an hour, nor can they be made a habit in a month.
It doesn't focus exclusively on "let's make the pie bigger", and it's more hands-on. NStD gives you practical tips, GtY is more of a framework (and maybe an ideology).
