Which volumes of HoME would you recommend?

[The Might]

Now, now, StW, let's not get to hasty there.
I agree with Mith fully because a buyer always has to check what he is buying first.

It is your personal opinion that CT should have chosen a perhaps more fitting name for the series and I can see where you're coming from.
However, I find the title quite fitting, because we are not talking about M-e as the place with all the infromation or "lore" as you may call it that comes along with it but as Tolkien's creation and the changes it underwent during the writing process.

I remember a few times that I bought something that I afterwards regreted not having looked up first but that was my own fault.