Harry Potter - and the huge money that goes with it

Don't worry - this is not plot spoiler or any where neat it. Actually have not read Harry Potter except for one book. I happened to read an article about the amount of money that was spent on maintaining the security of the book and secresy of the plot. It was a staggering 20 million in dollars. And was thinking if there might be a cheaper, smarter way. May be make the book in E-Format and those want to buy will get a secret password on buying to access it on the day of release. But thats a very bad idea as putting it on the web itself makes it more unsecure. It will be easy for a person to share it on the web any many other infinite ways. And I read another blog which suggest that they be allowed to buy a book without the last three chapers. One who buys the book will get a access to that last three chapters on the release day. Even though this too has its own disadvantage - this seems to be an idea to consider. Can anyone else think of better ways?