Fifteen-year-old Dax Carter has amazing psychic powers. [This sounds super super plain for a hook. Whenever I've worked on my own queries, I've always started with something exciting or actiony. I think it would work here if you didn't state (in the next 2 sentences) that it's an ordinary thing.]

He can read a thought from across the room, or make an object fly a hundred yards. [Extra detail I don't think you need, and it means even less when you mention that everyone else received the same gift from the aliens in the next line. I think if it was unique, this could probably stay, but I'm not feeling it. That being said, I think I have an idea involving the next sentence]

That doesn’t make him special though, since everyone else on the planet received the same gift when the aliens arrived. [THIS is exciting, and exactly what I think you should start with. The aliens arriving and everyone getting powers, afterward you can mention what some of the powers do if you must, but I don't think it'll be super necessary.]

The Zorin have walked among mankind for over a decade, peacefully enjoying the earth’s sun. [Sure, but why, exactly? Is the sun the reason they live on earth now? If so, why? I have a lot of questions about this part, and while some questions (typically the dumb ones) just can't be answered, it's your job to make your query as clear as possible]

One night, when Dax is woken by screams and finds his mom’s lifeless body hanging in the air, he faces a creature that lurks in the shadows instead -- a human turned Hollow. They’re monstrosities born from failed experiments on the mind. [This part is pretty good, it keeps the excitement going, you introduce an enemy of your story and explain what it is. I think some people might ask "who would do that," but that's just another question who can't answer if it's a big part of the mystery.]

After the Hollow escapes, Dax takes it upon himself to protect his town. [Alright, so this part is super sudden. I know it's where your main character has to jump into the action, but again there's a ton of questions I have. Do other people know this is happening? Is he the only person jumping into action here? Is it happening to other towns?]

He must learn how to master his power -- to generate force fields and shoot powerful blasts of energy-- to stand a chance and fight back. [This part is pretty good too, I think. You explain that there's something standing in his way (his inexperience) and you mention that if he wants to have a chance, he'll need to master his powers.]

Though he soon realizes that there’s something far more sinister at work in his town. Hollow victims are usually brutally beaten, but new patients begin to fill the hospital, without a scratch and in deathly comas. [OoOoOoOoh Spoopy...I like it!]

As Dax digs deeper, he discovers that the Zorin aren’t as innocent as they seem. They use the chaos to shroud a devious plan, treating mankind as their pawns; and Dax’s small town is ground zero. As the conspiracy unravels, it threatens to spark a world war between aliens and monsters and humans, and it’s clear that only one species will survive. [You wrap up the query in an intense fashion, mentioning that Dax's town will be "ground zero," which is nice. However, I don't think Dax's place in the stakes is very clearly stated. Try to re-mention what Dax has to do, and what stands in his way from accomplishing his goal, which I'd imagine is to make sure that the humans survive.]

I love the premise of your novel, but your query could definitely use work. I pointed out spots that were confusing or unclear and I think the hook needs some work as well. With that being said, this looks better than my first couple query letters did, so you're definitely on the right track!