I read Darth Bane: Path of Destruction and I really loved it. I flew through it in three days, which I rarely do with books.
I realise that it seems that I always bag the new canon and endlessly praise the Legends continuity, but I honestly don’t have any bias against the new canon. I actually love Lost Stars, Bloodline and The Force Awakens, but not much else has really grabbed me. On the other hand, most of the Legends material I’ve read I’ve been really invested in, and I find myself reading much more of those than the canon line of books.