Probably one of the lesser-quality series' I've read in a while. The delver people are never really explained in any detail. All we know is that they can move very fast and have an unnatural aversion to killing for any reason. They don't mind letting you go your merry way, knowing full well that you'll slaughter hundreds of innocents as soon as you find them, but they refuse to kill you and will actively seek to stop others from killing you. That was odd.
I found it particularly disconcerting that the majority of the deaths in the first few books were directly attributable to the Delver character refusing to kill the bad guy when he had him. Even with the bad guy standing on the corpses of slain humans, the delver found some convoluted reasoning for not taking his life. And then he complains that others (like the elves, dwarves and wizard) do something about the problem. Well, delver, if you had killed the bad guy any of the dozen or so times you found him, there wouldn't be this problem.
I kept reading the story, waiting for that moment of understanding to come to him, but it never did and I had to quit the series in frustration. I understand the need for an antagonist, but couldn't get over the fact that the real bad guy in the story was the one being touted as the hero! It was by his lack of action that the goblins were able to kill innocent farm kids. He did nothing and was allowing evil to triumph because he had some "high and mighty" belief system that couldn't be swayed. Better a thousand humans be slaughtered and enslaved than the delver actually use his abilities to stop it.
That certainly isn't the kind of "morality" I want to read about. The goblins were portrayed as absolute evil with the singular goal of destroying and/or enslaving all the other races on the planet. Okay. You don't let those kinds of people just walk away because they're going to come back. You're not going to teach them a lesson, have them see the error of their ways, and everyone lives happily ever after. As we saw in the first few books, hundreds of humans, elves and dwarves were killed by goblin attacks..... and the head bad guy that's organizing the whole thing was let go by the delver several times. That's a hero? Then we get to listen to the "hero" whine and cry that the wizard won't do something about it?
(review of free book)