def book_with_number(number)
      response = request(
        :book_with_number,
        "currentInvoiceHandle" => handle.to_hash,
        "number" => number
      )

      # Find the created Invoice
      session.invoices.find(response[:number])
    end
def book_with_number(number)
      response = request(
        :book_with_number,
        "currentInvoiceHandle" => handle.to_hash,
        "number" => number
      )

      # Find the created Invoice
      session.invoices.find(response[:number])
    end
Books a current invoice. The given number will be assigned to the
 resulting Economic::Invoice.

 Returns the resulting Economic::Invoice object