How do you reconcile pass book to cash book?

Reconciliation process is called "bank reconciliation statement" under which both company accounts balance of cash and bank is reconciled with balance of bank account provided by bank statement. The process is that first of all one statement is treated as base statement, it may be bank statement or books bank account but it is normally bank statement and after that the second statement balance is reconciled for any unrecorded transactions or any cheques issued but not presented in bank and after the reconciliation is completed both book's bank account as well as bank statement balance should be tally otherwise any discrepancies should be investigated and resolved.