pock·et·book /ˈpɑkətˌbʊk/
  袖珍本,筆記本
  Pock·et·book n. A small book or case for carrying papers, money, etc., in the pocket; also, a notebook for the pocket.
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  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]
       3: pocket-sized paperback book [syn: pocket book, pocket
          edition]
       4: a bag 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, purse]