I am writing a book for a technical industry. I'm planning on including a glossary, I wanted to know, should I place this at the beginning of the book or at the end of the book?
There is no "correct" answer here. It really depends on what your goal is: if it's to inform the audience of terms before they start reading the main text, then it might make sense to place it in the "front matter." On the other hand, if you expect readers to consult it as needed when they're reading, then typically you'd place it at the end of the book with the appendices.