I'm starting to read the Diablo books series and I'm looking for correct order of books to start reading. Is there any recommended order for this book series?
This page offers a publication history of the book series
This page offers an in-universe chronology of the book series.
What is important to note is that they do not have to be read in this [publication] order. The only books that depend on previous books are the Sin War trilogy (which should be read in order) and the Kingdom of Shadow and Moon of the Spider, of which KoS should be read first and MotS should be read second. All other books can be read in any order without having any detrimental effect on the plot or story or spoiling anything.