This book has previously unknown, and forbidden knowledge. When Luke was talking about he sacred Jedi text in The Last Jedi, he was referring solely to this masterpiece. A book, heavily sought after by Jedi and Sith alike for its unlimited knowledge of both sides of the force. After the destruction of the Jedi temple, the great Jedi Bob shot the book into space where eons later it would eventually crash on Earth and be discovered by the famed Indiana Jones, and given to the government. After being held at the infamous area 51, They finally decided eventually in 2009, to declassify, and publish for sale where it would become an NY Times best seller. Kathleen Kennedy was actually inspired by this book, and took a lot of elements to make the Sequel trilogy and Rogue One. I highly recommend, as it will enlighten you, and empower you to be the Jedi (or Sith) that you aspire to be.