What is the “Ultimate Book of The Master”

Dragon magazine #82 features an article from Bruce Heard referencing magical research. One early chapter contains the following line:

To begin finding the answer to that question, we must first roll up our sleeves and open the Ultimate Book of The Master to page 115, whereupon begins the section on spell research

I have done a Google search, but cannot find any references to the "Ultimate Book of The Master". Does anyone have any information on what this book may be? Is it just a reference to a fictional in-game tome?

The specific edition referenced is AD&D (my understanding is that can mean 1st or 2nd edition and I am not sure which it refers to). The magazine was published in February 1984 if that helps.