The Collaborative International Dictionary of English v.0.48:

Pocketbook \Pock"et*book`\, n.
   A small book or case for carrying papers, money, etc., in the
   pocket; also, a notebook for the pocket.
   [1913 Webster]

WordNet (r) 3.0 (2006):

pocketbook
    n 1: your personal financial means; "that car is too expensive
         for my pocketbook"
    2: a pocket-size case for holding papers and paper money [syn:
       wallet, billfold, notecase, pocketbook]
    3: pocket-sized paperback book [syn: pocketbook, pocket
       book, pocket edition]
    4: a container used for carrying money and small personal items
       or accessories (especially by women); "she reached into her
       bag and found a comb" [syn: bag, handbag, pocketbook,
       purse]

Moby Thesaurus II by Grady Ward, 1.0:

55 Moby Thesaurus words for "pocketbook":
   Domesday Book, account book, address book, adversaria, album,
   annual, appointment calendar, appointment schedule, bag, billfold,
   blankbook, blotter, calendar, cashbook, catalog,
   classified catalog, commonplace book, court calendar, daybook,
   desk calendar, diary, diptych, docket, engagement book, handbag,
   journal, ledger, log, logbook, loose-leaf notebook, memo book,
   memorandum book, memory book, money belt, money clip, notebook,
   pad, petty cashbook, pocket, pocket notebook, poke, police blotter,
   porte-monnaie, purse, purse strings, scrapbook, scratch pad,
   spiral notebook, table, tablet, triptych, wallet, workbook,
   writing tablet, yearbook