Spencer's mother refers to the Margery Kempe book that Spencer gave her as "one of her minor works." Margery Kempe only wrote one book, The Booke of Margery Kempe, which she dictated because she was illiterate. There are no other works by her.
Garcia's carelessness and breach of security protocols would have definitely caused her to lose her job (and possibly even lead to prosecution) had this been a real scenario within the F.B.I. Not only did she risk the lives of the B.A.U. but also top-level security information could have been compromised.