The LLM is the output of the training system; the LLM doesn't do the reading, the trainer does. The LLM doesn't "contain" a copy of the book. But some LLMs see

The LLM is the output of the training system; the LLM doesn't do the reading, the trainer does. The LLM doesn't "contain" a copy of the book. But some LLMs seem to be able to quote on demand from a wide range of literature; these models evidently do have some kind of memory, even if it's been distilled and blended and distilled again.