That's nearly correct, but look at the case after "in": It's accusative ("in die Bücherwelt"), so it denotes a direction, which means you translate it using "into": ..., someone from the real world must disappear into the World of Books/Bookworld. Also, "herausgelesen" in the context of a "Bücherwelt" probably means "extracted by reading" or something like that. It's actually a play on words, because "lesen" also has the older meaning "to select, to extract" besides "to read".