Definition of pocketbooks:
(n) :
(US) A purse or handbag.
(n) :
(figuratively) One's personal budget or financial capacity; the amount one can afford.
(n) :
(dated) A wallet for paper money.
(n) :
(uncommon) A small book, particularly (US) a paperback or (UK) notebook able to fit into a pocket (of any genre, from reference work to fine art).
(n) :
(Philippines, by extension) A romance novel published as a small paperback.