Which volumes of HoME would you recommend?

[Galin]

You maybe mean The War of the Jools, or HME XI The War of the Jewels which includes (very basically):

The Grey Annals

The Later Quenta Silmarillion II (following after HME X)

The Wanderings of Húrin (and other texts)

Æfwine and Dírhaval 'introductory note' to the Narn i Chin Húrin

Maeglin

Of the Ents and the Eagles (later additions to the chapter of Aulë and Yavanna are discussed)

The Tale of Years

Quendi and Eldar (a linguistic essay)

the Awakening of the Quendi (in an appendix, a child's tale mingled with counting lore)

Thanks to Mellonath Daeron.