Answer:
i- dude what happened like
The main clause here is The man autographed copies of it at the bookstore. This means that the subordinate clause is what is left - who wrote this new and popular book.
The subordinate clause functions as an adjective, which means that it describes the subject <em>the man. </em>
I'd been to public entertainments before, of course; I'd been to the cinema and the pantomime and to see my mother sing in the chorus of the White Horse Inn at the Town Hall. But that was different.
