Sorcery of Thorns de Margaret Rogerson
She knew these weren't ordinary boks the Great Library kept. They whisperedon the shelves and shuddered beneath iron chains. Some spat ink and threw tantrums; others sang to themselves in high, clear notes on windless nights, when starlight streamed through the library's barred windows like shafts of mercury. Others still were so dangerous they had to be stored in the underground vault, packed in salt. Not all of them were her friends. She understood that well.