what is the Petty cash book ?

The purpose would be taking money out for small incidentals purchases like stamps, lunch, minor office supplies that may be too small to order, stationery supplies (envelopes) etc. It's money that would have to be either repaid (by the person borrowing) or replenished by the owner or both. The book is a money journal that keeps track of what amounts are borrowed by whom and for what reason.

Petty cash is a small cash fund used for incidental expenses.

It saves the issuance of checks for incidental purchases.

A check is issued for the cash amount, and cashed for that purpose/s.

It may be only $100.00 at any given time.

An employee may need cab fare for business purposes and can be reimbursed from the fund.

An expense slip is placed in the "fund box" to explain the expense, and usually those slips with the balance of cash should balance with the original check amount.

In the expense col., "Petty Cash" is recorded from the original check with no further details necessary.

Petty cash book is a accounting term. Petty cash book is used to record, how the cash available for day-to-day expenses are spent, eg stationary, milk...small small expenses. It is a book in which all cash transactions of the business are recorded.

Well you know about the books ie the accounts books ,,, yes, well the petty cash book is the book that show you all the petty cash transactions...

I have heard of a petty cash Box not book ... monies are used for office parties , gifts etc

it is a transcript of flows of fund mainly for petty expenses of operation, a requirement for audit purposes.