No, but if you have both QuickBooks and POS you can use them together. There are a few things that need to be made sure of to provide smooth functionality.
Part numbers in the POS system need to match what is put into the store.
Order Numbers that import from POS to 'full' QuickBooks need to have different order numbers from the orders that import from the website (or vice versa). This can be done within MonsterBooks by going to Change Settings >> Orders tab and adding either a prefix and/or suffix to the order.