The problem when trying to organize the novels chronologicaly is many of the novels are huge flashbacks (or actualy time travel adventures) from a time in the future. Sometimes it’s advantageous to know what’s going to happen to understand the significance of the past and other times it’s easy to ignore (Last Guardian)

This is the order i recommend most and is almost entirely chronological by the main events of the book. The exception is the War of the Ancients Trilogy because it really helps to read Day of the Dragon first

Rise of the Horde (pre first war)*
The Last Guardian (first war)**
Tides of Darkness (second war)
Beyond the Dark Portal (post second war)
Day of the Dragon (post second war)
Lord of the Clans (pre third war)
Of Blood and Honor (pre third war)
War of the Ancients Trilogy (war of the ancients-post third war)***
Cycle of Hatred (pre wow)
The Sunwell Trilogy (pre wow)
Night of the Dragon (post bc)

*Rise of the Horde is narrarated by Thrall from the time just prior to the events that occoured in “The Burning Crusade”. But most of the book is about the Rise of the Horde on Draenor.

**The Last Guardian is actualy a flashback from Medivh when he returns to Karazhan just before the Third War.

***The War of the Ancients starts out in the aftermath of the Third War, before jumping back 10,000 years in time. However i don’t recommend reading this novel first because the events and characters from the future are a big part of this novel (Unlike Rise of the Horde and The Last Guardian whose events in the future are ambiguous and ignorable). So it’s a good idea to have read the books up to the third war and played Warcraft III to really understand these novels.

Warcraft legends are random short storys, about half of which so far take place in the modern WoW era. A few take place in the past but these storys are short so i recomend reading them after everything else.