The purpose of the salt talks and the start treaty was

It was to define the boundaries of Europe after WW2 and to limit the number of nuclear weapons held by the superpowers. It was also to negotiate an end to the Vietnam war. :)

What book is this referring to?

Opposition to the nra came to a head in 1935, when the conservative supreme court declared the agency unconstitutional, claiming the nra gave the executive branch regulatory powers that belonged exclusively to congress. this decision began a series of court decisions that overturned key elements of the new deal.