Valedor by Guy Haley.
I have read just about every Eldar novel there is except for those abominations by Goto. Andy Chambers and Guy Haley write much more fluidly and give more earthy visceral descriptions (particularly Andy Chambers) as compared to Gav Thorpe, whose writing is at times sparse in detail and a bit stilted or laconic. Gav seems to dwell more on the mythological and lifestyle aspects of the Eldar, and his plots seem to hit all the right plot points except...somehow they just don't have that emotional feel that I get from Andy Chambers and Guy Haley in comparison. It is a matter of writing style.
Having finished
Carrion Throne by Chris Wraight, I admit I am impressed as he seems to be among the best writers
BL in his use of words and language. I wonder if he would ever turn his hand to Eldar or any other non-Imperial tale.
Addendum: Gav Thorpe's blog has announced the separate publishing of the Eldar short story
Dark Son which revolves around the Striking Scorpion Bechareth or rather his former life as the Incubus Kolidaran.
Gav Thorpe also gives an interview:
http://hwcdn.libsyn.com/p/e/2/f/e2f6057f8f225669/Splintermind_Episode_34_Gavin_Thorpe_Jain_Zar_Interview.mp3?c_id=15988161&destination_id=227626&expiration=1501959652&hwt=bc324021e513900abb8bb8984d1d22ff
Unfortunately at around 128 minutes, Gav Thorpe gives details that really blow the continuity of the Jain Zar novel out of the water. Earlier he had said Jain Zar was set pre-Fall and also had a story thread post-Fall but pre-Horus Heresy. However the details he drops about Vect in both the book and this interview show it
cannot be pre- Horus Heresy because he describes a Vect in control of Commorragh and the noble houses devastated. That did not occur til long after the Horus Heresy.
https://gavthorpe.co.uk/2017/06/29/june-2017-qa-part-2/
His reply to my pointing out the continuity still doesn't correct unless we assume a very unreliable criminally incompetent narrator.
Even if the timeline was off by a millenium, M34 instead of M35 being the time when Vect rose to power would still make it post-Heresy.
I remain disappointed that the main Eldar author at
BL can make such glaring timeline error involving Vect, a character he originally invented. Frankly I don't even know why the insistence on it being pre-Heresy since as far as I can tell, there is nothing in the plot that specifically requires it to be so.