Fantasy - Boy kicked out of 6 or 7 schools, sent to a camp disguised as bootcamp but is really a camp where they teach children how to fight monsters and go on missions, he makes friends at the camp and I think only the kids can see monsters

[Bailey]

I read this book (might have been part of a series?) a couple years ago, maybe 3-5 years? I know a bunch of details (in the header) but can't seem to find it online anywhere...

[Ann]

I"m guessing this is the wildly popular Percy Jackson series. The first book is The Lightning Thief, where Percy goes to Camp Halfblood for the first time.

[Bailey]

Ann wrote: "I"m guessing this is the wildly popular Percy Jackson series. The first book is The Lightning Thief, where Percy goes to Camp Halfblood for the first time."
No, but it was similar. I did really like Percy Jackson, though, but no, it wasn't that. I finished the Camp Half-Blood Chronicles a few months ago. I can see why my description fits PJ, though, with the "naughty" kid kicked out of schools, and quests, and that only some people (kids vs demigods) can see monsters. I do remember now that in the series I'm talking about there are these older kids who are losing their ability to see monsters (and there's a lot of emphasis on how buff they are) who are supposed to keep the younger kids in line... thanks for trying to help!

Edit: I think there was also something about the main character secretly becoming friends with one of the older kids who helps his and his other friends, and something about the main character doing something wrong at the camp so the counsellors made him go to a basement of sorts which is where he made all of his friends... I know I'm being really vague about random details I remember, sorry. I think there was also a mission where they went into the sea or something-

Edit number two: And another random detail, there was something about the fact that one of the older kids was somebody or other's brother (maybe the main character's???) which is the whole reason he was being nice to the main character-asfdg i can't remember anything but weird details ahhh

[Kris]

Bailey, can you describe the type of monsters they fight?

What type of weapons, powers or magic do they learn to use? Boys and girls?

[Bailey]

They're monsters... just monsters, of all kinds. I mean the kind that are scary and whatnot, I remember one underwater one specifically but not the name. I don't recall anything to do with powers and magic but they must have used something. Yes, there were boys and girls.