Why?.... that's my greatest question. I'm an avid user of Amazon Kindle I buy my books and reading them I truly don't understand this concept of waiting 6 hours in order to read another chapter it makes me lose interest in the book that I just started reading and I was so excited about the book I was going through and I'm like wow but now it's telling me I need to wait six hours in order to read the next chapter. I'm a fast reader in 6 hours I usually finish an entire book