YA fantasy- demons, shipping containers, illuminati, stonemasons

[Hyunji]

so a group of people are demon hunters and they go to a grave of a stonemason and theres a loose brick and under it is a secret message. they hunt the demon down into a jail of some sort, and i think theres like a salt water sprinkler to torture the demon. the demon manages to get one of the girls into the jail and tortures her and eventually either the illuminati or the stonemasons come and rescue her and kill or disable the demon. i might be mixing uo 2 books but i cant remember either of them

[Kris]

Hyunji, around what year did you read this book?

[Lobstergirl, au gratin]

Hyunji, are you still looking for this or did you find it?