pocketbook

noun

Etymology: 1610s, from pocket + book, popularized in its sense as a paperback by the success of Pocket Books in the United States after its 1939 launch.

1. A purse or handbag.
2. A wallet for paper money.
3. One's personal budget or financial capacity; the amount one can afford.
4. 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).

   “The publishers brought out small format pocketbooks of the whole of their nature series.”

   “The pocket books are in trouble. A creeping extralegal censorship threatens to bowdlerize the product[…]”

5. 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).