I just got the World of Warcraft: Chronicle Volume 1, and I have to say I'm quite happy with it. It reveals a lot of details and puts it in stone regarding life before Azeroth and the early days of Azeroth itself.
I know this most likely should be in the lore section, but I posted it here because it tells a lot about Odyn and the halls of valor, our upcoming class hall, how he came to be and how he made the Halls of Valor. This just provides a certain insight to the whole warriors->Vrykul connection that was being shoved down our throats in Legion.
Some people might see things differently as it is very subjective and everyone is entitled to his own opinion, but I feel more connected to the whole warriors theme in Legion after that read, so I would recommend it to anyone here.