This describe a process used by J.K. Rowling to write the 5th HP book.
Am I the only one to think this is also the worse book in the series ?
So, in terms of how it keeps you excited, it failed but the book packs a lot of other useful information which were referenced in the books that follow.
There are opinions. It was actually my second favourite in the series
Personally, I hate the last book but all of the others are just fine.