There was a book in my college's library it was brilliant. but its gone now i booked it out last year. and now its not in stock. but another events management book that concentrates on gigs and festivals is a book called
Event Management
by Glenn Bowdin
another recommended read by my course tutors in event management have been
Events Management: An Integrated and Practical Approach
by Razaq Raj, Paul Walter, Mr Tahir Rashi.
hope this helps your niece.