All the histories though- how do they read? Are they like the Silmarillion? Do they explain a lot that you don't get reading just the major works, or are they more of an earlier version of LotR?
The Histories can be really tough because Christopher has attempted to compile the scattered and disjointed notes and manuscripts his father used in creating the mythology that is Middle Earth.
The Book of Lost Tales, Volumes 1 and 2, are quite hard to follow, and it seemed best to try and disassoicate them from The Silmarillion, even though that is kind of difficult.
In the rest of the Volumes, he does try to guide you on how to approach each chapter or excerpt. A suggestion would be to find the footnotes for each chapter and place a bookmark there...then read the foot notes as soon as the reference (a number) appears in the text.
It is a bit overwhelming to see the amount of changes and emendments that went into the creation of the original printed works, after reading all 12 volumes of this.
"Thank Heaven" for computers and the ability to save stuff on discs in this day and age.