Reply To: How to start making a booklet in InDesign 5.5

there is a difference between an indesign file type of BOOK and the dialog PRINT BOOKLET. the PRINT BOOKLET feature is used to print (to a desktop printer usually) artwork which will be bound in a saddle-stitched manner.

However, indesign's BOOK feature is a way of combining many indesign files together without putting them into the same file. can be used to make books, but the binding of the book is not necessarily saddle stitched, could be burst bound, wiro, case bound etc.

so i understand the OP's confusion.