My experiences with The Grail Message
My exposure to the book - In The Light of Truth: The Grail Message by Abdrushin - was via the final authorized edition which has 3 volumes and usually comes with a green covering. The Lectures are arranged to build up your spiritual knowledge which means you have to start with volume 1, Lecture 1 and progress in that order. Once you have completed volume 1 and you are interested in expanding your knowledge much further then you can obtain volume 2 and start with Lecture 1. And if you still feel the need to expand your knowledge much further, then obtain volume 3 and start with Lecture 1. If you decide to jump lectures and read them randomly, then this book will be of no benefit to you. If interested, you can make a purchase from here: GrailMessage.com
A few years later, I came across a different version of the Grail Message which is called the 1931 edition. This version contains some Lectures accessible and not accessible on 'the final authorized edition'. The reasoning behind this was given here: The historical development of In The Light of Truth - The Grail Message.
At the same time, I came across two more books titled 'Resonances to The Grail Message - Volume 1 and 2'. This version also contains some Lectures accessible and not accessible on 'the final authorized edition'. The Lectures are more advanced so you must have completed either 'The final authorized edition' or 'The 1931 edition' before you can delve into these two. The reasoning behind the Resonances to The Grail Message can also be found via the external link provided above.
If you want copies of 'The 1931 edition of The Grail Message' and 'Resonances to The Grail Message', you can obtain them from here: In The Light of Truth: The Grail Message - 1931 edition and Resonances to The Grail Message.
The more I read, the more I crossed paths with more and more writings centered on The Grail Message. One of such writings is: Other Lectures and Writings of Abdruschin. This book made a big impression on me. I would suggest this book is read last (that is after reading 'The Final Authorized version - volumes 1,2,3', 'The 1931 edition' and 'Resonances to The Grail Message - volumes 1 and 2') because you will need a very good exposure to The Grail Message before you can delve into this - in my opinion. The book can be obtained from here: Other Lectures and Writings of Abdruschin
If anyone is interested in reading In The Light of Truth: The Grail Message by Abdrushin, I would advise the individual to approach it in this order:
The Final Authorized version - Volumes 1,2 and 3
The 1931 edition
Resonances to The Grail Message - Volumes 1 and 2
Other Lectures and Writings of Abdruschin
There are other writings which are centered on or aligns with the teachings of The Grail Message which helped broaden my understanding. I would suggest that at least The Final Authorized version - volumes 1,2 and 3 have been read before delving into any of these which are listed below in no particular order:
From Past Millennia. This can be purchased from here: GrailMessage.com
Past Eras Awaken - Volumes 1,2 and 3. These can be purchased from here: GrailMessage.com
Lao-Tse. This can be purchased from here: GrailMessage.com
Mohammed. This can be purchased from here: GrailMessage.com
Buddha. This can be purchased from here: GrailMessage.com
Ephesus. This can be purchased from here: GrailMessage.com
Zoroaster. This can be purchased from here: GrailMessage.com
Questions and Answers. This can be purchased from here: GrailMessage.com
A Gate Opens. This can be purchased from here: GrailMessage.com
What lies behind it..!. This can be purchased from here: GrailMessage.com
The World, as it could be!: This can be purchased from here: GrailMessage.com
Knowledge for the World of Tomorrow!. This can be purchased from here: GrailMessage.com
Lectures In The Proximity to Abdrushin - Dr. Kurt Illig. This can be purchased from here: Alexander Bernhardt Publishing
The School of Concepts. This can be purchased from here: Alexander Bernhardt Publishing
The Spiritual Mysteries of Blood. This can be purchased from here: Christopher Vasey
The Revelation of John the Baptist. This can be purchased from here: The Revelation of John the Baptist
The key thing you must always remember when reading is that the message is always addressing the individual and that is, yourself.