This is your trope story of your innocent kid finding she has superpowers. The problem is that by fully a third the way through this novel, I had no idea whatsoever what her superpower was. None! At all! That was strike one. The story has the tired cliché of her being delivered to 'enlightenment' by some new guy she meets - because you know that no girl can do a damned thing on her own. That was strike two. Worse, it seemed to be going nowhere, and taking its own sweet time even about doing that, so that was strike three, and I ditched it at a third in, and moved onto something more interesting.
The main character is Sierra Santiago, a young artist (who never actually does any art) who is tasked by her grandfather with updating a fading mural painting which evidently offers some sort of protection (I guess) against some sort of a threat (I imagine), which begs the question: why didn't grandaddy get off his lazy ass and fix things in his younger years? This story is written way younger than the characters in it!
Anyway, Sierra meets the new guy in school of course, who is also an artist (who never does anything other than token art), of course, and who will be her validator. Before he even deigns to lift a finger to help her, she's accosted by a reanimated corpse (although she doesn't know it at the time) demanding answers to a question she doesn't even understand. The ridiculous name they give to the corpse is 'corpuscle' which doesn't work (neither does the name John Wick which also turned me off this story). Even then this guy Sierra befriends is really tight with information like he wants her to struggle. Some friend.
There was diversity in this story, but I don't think reviewers at this point should be giving credit to stories for being inclusionary and presenting a diverse array of characters! That should be the norm - the baseline, so I don't give extra credit for that.
The story seemed to be going around in vacuous circles and sure didn't want to tell me anything, so I said the hell with it. You want to keep the story to yourself, why even publish the freaking novel in the first place?! I can't commend this at all.