Saltglass. Riverside Mysteries, #8

Alex Moreton thought she understood grief. She thought she understood archives too: their order, their absences, the way a missing page could say more than a hundred that remained. Then she finds a hidden vault beneath the university, and inside it a record of everything her family and her institution have spent generations trying not to know. There is a dead girl, a dead engineer, a ledger that keeps the dark half of the story, and a woman who has spent forty years standing guard over a secret that was never meant to last this long.
As the truth rises, so does the cost of it. Friendships become evidence. Family becomes motive. And the room under the library begins to give up the names the world was never supposed to hear.