Thomas K. Carpenter

The halls are dark. The magic is deadly. Trust no one. Iona claws her way into Coterie of Mages - a prestigious, cutthroat magical university hidden within the Obelisk of the City of Sorcery. But for a backwater girl without family connections, survival is far from guaranteed. The students are cruel, the professors indifferent, and the building itself whispers secrets in the dark. What unfolds across five books is a relentlessly escalating dark academia fantasy - part survival story, part underdog triumph, and part war against forces that were never meant to be woken.
Iona and her unlikely allies face enemies on every side: scheming classmates, ancient horrors, and powers that dwarf anything the Hundred Halls has faced before. The deeper they go, the more the line between student and monster disappears. This omnibus collects the complete Coterie of Mages series - five books of dark magic, fierce loyalty, and the kind of hard-won power that only comes from surviving the unsurvivable.