Initiation Candle

When the Ender Dragon was first defeated, no Dragon Egg was ever found. Instead, four candles appeared where the Dragon Egg should have been, along with a book containing a cryptic message:

The written contents of the mysterious book

And when the Ender Dragon is respawned and killed with Looting III, it drops an Initiation Candle...

An Initiation Candle in an inventory slot

Where is the Dragon Egg? What is an Initiation Candle? Who wrote the book, and what is the final missing word?