I have started reading the Wheel of Time series last year and I am now on the fourth book, *The Shadow Rising. There is a lot of info to take in and I enjoy the world building very much.
I have often seen the Wheel of Time Companion in book stores and I would love to read it as a companion piece, however, I am very fearful of spoilers.
My question is thus, If it is advised to use the The Wheel of Time Companion as a glossary to the books,using it as reference or looking up something I may have forgotten. Or is it best left until after the series?
Note: I am unsure if this is a duplicate question as I did not review the suggestion questions. Fear of spoilers being the primary motivation.