Perfect bound books lie flat. Perfect binding is economical. This is hardback. Case binding is expensive and a more intricate process than other binding. It is appropriate for presentation copies and assured bestsellers.
Many authors choose to case bind a few hundred copies.
It is basically spiral binding or rivet binding. It is acceptable for the officeplace but not the commercial book market. Finishing Finishing is the catch-all process of book printing. Obviously, some of these options are related to the design of your book and cover and some are related to your decisions about distribution and fulfillment. The one thing you do want is film lamination of your cover.